Journal of Magnetism and Magnetic Materials最新文献

筛选
英文 中文
Magnetoresistance sensors with CoCr ferromagnetic films CoCr铁磁薄膜磁阻传感器
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-07-09 DOI: 10.1016/j.jmmm.2025.173314
Mingbo Chen , Yichao Zhou , Weibin Chen , Zhengren Yan , Kai Chen , Huizhen Wu , Tiejun Zhou , Shikun He , Changqiu Yu
{"title":"Magnetoresistance sensors with CoCr ferromagnetic films","authors":"Mingbo Chen ,&nbsp;Yichao Zhou ,&nbsp;Weibin Chen ,&nbsp;Zhengren Yan ,&nbsp;Kai Chen ,&nbsp;Huizhen Wu ,&nbsp;Tiejun Zhou ,&nbsp;Shikun He ,&nbsp;Changqiu Yu","doi":"10.1016/j.jmmm.2025.173314","DOIUrl":"10.1016/j.jmmm.2025.173314","url":null,"abstract":"<div><div>The magnetic properties of CoCr thin films are studied for the enhancement of the sensitivity of Z-axis tunneling magnetoresistance sensors. We demonstrate that the CoCr film achieves a low saturation magnetization of 45<!--> <!-->emu/cm<sup>3</sup> at a Cr concentration of 35 at.%, while maintaining thermal stability up to 400<!--> <!-->°C. Incorporating this soft ferromagnetic layer into the magnetic free layer allows significant reduction of the anisotropy field, consistent with the simulated results. Spin valves employing CoCr films were fabricated and giant magnetoresistance was measured. It is revealed that the Co/CoCr composite free layer exhibits twice the sensitivity of a pure Co free layer. These findings highlight the potential of CoFeB/CoCr-based structures for improving the sensitivity of magnetoresistance sensors.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173314"},"PeriodicalIF":2.5,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Observation of three-dimensional Ising to uniaxial dipolar crossover in a double exchange ferromagnet 双交换铁磁体中三维伊辛至单轴偶极交叉的观察
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-07-08 DOI: 10.1016/j.jmmm.2025.173323
Mukesh Verma , Abhinav Kumar Khorwal , Pardeep , G.A. Basheed , Ajit K. Patra , S.N. Kaul , Yugandhar Bitla
{"title":"Observation of three-dimensional Ising to uniaxial dipolar crossover in a double exchange ferromagnet","authors":"Mukesh Verma ,&nbsp;Abhinav Kumar Khorwal ,&nbsp;Pardeep ,&nbsp;G.A. Basheed ,&nbsp;Ajit K. Patra ,&nbsp;S.N. Kaul ,&nbsp;Yugandhar Bitla","doi":"10.1016/j.jmmm.2025.173323","DOIUrl":"10.1016/j.jmmm.2025.173323","url":null,"abstract":"<div><div>The present study examines the physical properties of a double-exchange ferromagnet <span><math><mrow><mi>L</mi><msub><mrow><mi>a</mi></mrow><mrow><mn>0</mn><mo>.</mo><mn>7</mn><mo>−</mo><mi>y</mi></mrow></msub><msub><mrow><mo>□</mo></mrow><mrow><mi>y</mi></mrow></msub><mi>S</mi><msub><mrow><mi>r</mi></mrow><mrow><mn>0</mn><mo>.</mo><mn>3</mn></mrow></msub><mi>M</mi><mi>n</mi><msub><mrow><mi>O</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span> (LSMO) with (y = 0.11) and without (y = 0) La-deficiency using X-ray diffraction, X-ray photoelectron spectroscopy, dc magnetization, and AC susceptibility measurement techniques. X-ray diffraction analysis confirms that both samples are single-phase and crystallize in rhombohedral crystal symmetry (<span><math><mrow><mi>R</mi><mover><mrow><mn>3</mn></mrow><mrow><mo>̄</mo></mrow></mover><mi>c</mi></mrow></math></span>). The unit cell volume, octahedral bond length (Mn-O), and Curie temperature (<span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>C</mi></mrow></msub></math></span>) decrease while the Mn-O-Mn bond angle increases in the La-deficient (<span><math><mrow><mi>y</mi><mo>=</mo><mn>0</mn><mo>.</mo><mn>11</mn></mrow></math></span>) sample. Magnetic analysis discloses enhanced magnetic anisotropy and inhomogeneities in the La-deficient sample due to a partial increase in <span><math><mrow><mi>M</mi><msup><mrow><mi>n</mi></mrow><mrow><mn>4</mn><mo>+</mo></mrow></msup></mrow></math></span> concentration. In the asymptotic critical region, the ac susceptibility and critical isotherm analyses unveiled mean-field behaviour in La-deficient (<span><math><mrow><mi>y</mi><mo>=</mo><mn>0</mn><mo>.</mo><mn>11</mn></mrow></math></span>) sample as opposed to 3D Ising behaviour in the parent (<span><math><mrow><mi>y</mi><mo>=</mo><mn>0</mn></mrow></math></span>) compound. This is in accordance with renormalization group (RG) theory prediction wherein dipolar interactions drastically modify the critical behaviour of a 3D Ising (d = 3 and n = 1) system so much so that the system behaves as a uniaxial dipolar ferromagnet in the asymptotic critical region characterized by mean-field critical exponents with logarithmic corrections to the single power laws. The dipole–dipole interactions operating between the localized <span><math><msub><mrow><mi>e</mi></mrow><mrow><mi>g</mi></mrow></msub></math></span>/<span><math><msub><mrow><mi>t</mi></mrow><mrow><mn>2</mn><mi>g</mi></mrow></msub></math></span> electrons get progressively enhanced with La-deficiency and consequently, the nature of ferromagnetic (FM)-paramagnetic (PM) phase transition is altered from 3D Ising to a 3D uniaxial dipolar ferromagnet in the asymptotic critical region. These observations, indeed, mark the importance of the interplay between magnetic anisotropy and dipolar interactions in governing the critical behaviour of hole-doped manganites.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173323"},"PeriodicalIF":2.5,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Blood flow through a deformable artery and magnetically targeted drug delivery 血液流经可变形的动脉,通过磁性靶向药物输送
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-07-07 DOI: 10.1016/j.jmmm.2025.173325
Biswarup Mandal, Gopal Chandra Shit
{"title":"Blood flow through a deformable artery and magnetically targeted drug delivery","authors":"Biswarup Mandal,&nbsp;Gopal Chandra Shit","doi":"10.1016/j.jmmm.2025.173325","DOIUrl":"10.1016/j.jmmm.2025.173325","url":null,"abstract":"<div><div>Drug targeting with magnetic nanoparticles to a diseased location is of greater interest in medicine for controlling tumor growth, removing blood clots, managing infections, and treating cardiovascular diseases like atherosclerosis and aneurysm. This article aims to develop a mathematical model for blood flow with injected drug carrier particles into the bloodstream. We assume that carrier particles are loaded with both drug molecules and magnetic nanoparticles, enabling targeted drug delivery to specific locations within the bloodstream by applying an external magnetic field. The arterial wall is assumed to be a linearly elastic solid, undergoing deformation as pressure waves propagate along the blood vessel, driven by the periodic pumping action of the heart. We obtain analytical solutions in two dimensions, considering certain limitations on the nonlinearity of the governing equations. We present solutions based on the Young wave mode (radial deformation) and Lamb wave mode (axial deformation) to observe the impact of wall deformation on the motion of the carrier particles and blood flow. The capturing efficiency of the carrier particles increases with either an increase in the radius or volume fraction of the carriers. The velocity of the carrier particles decreases as the distance from the source of an external magnetic field increases. The trajectory of the carrier particles clearly shows the capturing efficiency, which leads to a greater influence on magnetic particle imaging (MPI).</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173325"},"PeriodicalIF":2.5,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spin-valve-like magnetoresistance in epitaxial Fe56Mn44 films 外延Fe56Mn44薄膜的自旋阀样磁阻
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-07-07 DOI: 10.1016/j.jmmm.2025.173347
Yongzuo Wang , Ping Ma , Peng Chen, Xiaolin Li, Zhongjie Yan, Cunxu Gao
{"title":"Spin-valve-like magnetoresistance in epitaxial Fe56Mn44 films","authors":"Yongzuo Wang ,&nbsp;Ping Ma ,&nbsp;Peng Chen,&nbsp;Xiaolin Li,&nbsp;Zhongjie Yan,&nbsp;Cunxu Gao","doi":"10.1016/j.jmmm.2025.173347","DOIUrl":"10.1016/j.jmmm.2025.173347","url":null,"abstract":"<div><div>Benefiting from the advantages of antiferromagnets, such as external-field robustness, ultrafast dynamics, and stray-field-free characteristics, spin-dependent effects in antiferromagnets have garnered extensive attention. Here we report the observation of a spin-valve-like magnetoresistance in epitaxial prototype antiferromagnet Fe<sub>x</sub>Mn<sub>100-x</sub> thin films, arising from spin-dependent scattering at interfaces between ferromagnetic clusters and the antiferromagnetic background. This magnetoresistance persists at room temperature and withstands magnetic field up to 70 kOe, owing to the pinning effect from the antiferromagnetic background. In contrast to conventional understanding that focuses on antisite disorder, our studies reveal that this phenomenon emerges only in nonstoichiometric Fe<sub>x</sub>Mn<sub>100-x</sub>, while disappearing completely in the equiatomic Fe<sub>50</sub>Mn<sub>50</sub> films. Our results provide opportunities for tailoring spin-dependent transport in antiferromagnets through precise composition control.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173347"},"PeriodicalIF":2.5,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic hysteresis on Shastry-Sutherland lattice Shastry-Sutherland格上的动态滞回
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-07-05 DOI: 10.1016/j.jmmm.2025.173346
Ersin Kantar , Mehmet Ertaş
{"title":"Dynamic hysteresis on Shastry-Sutherland lattice","authors":"Ersin Kantar ,&nbsp;Mehmet Ertaş","doi":"10.1016/j.jmmm.2025.173346","DOIUrl":"10.1016/j.jmmm.2025.173346","url":null,"abstract":"<div><div>Dynamical hysteresis, a phenomenon observed in ferromagnetic systems near their critical temperature, is investigated within the context of the spin <span><math><mrow><mo>-</mo><mn>1</mn><mo>/</mo><mn>2</mn></mrow></math></span> Ising model on the Shastry-Sutherland lattice using mean-field theory and Glauber dynamics. This study aims to elucidate the dependence of dynamic hysteresis on various parameters such as temperature, magnetic field amplitude, and antiferromagnetic exchange interactions. The results reveal complex hysteresis behaviours, including both symmetric and asymmetric loops, contingent upon the specific values of the Hamiltonian parameters. Notably, as the temperature increases, the system transitions from a ferromagnetic to a paramagnetic phase, characterized by distinct changes in hysteresis loop symmetry. These findings align well with existing theoretical and experimental studies, offering insights into the dynamic magnetic properties of frustrated systems. The comprehensive analysis presented here is expected to stimulate further theoretical and experimental research on nonequilibrium magnetic phenomena in Shastry-Sutherland magnets and related materials.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173346"},"PeriodicalIF":2.5,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144579390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mesoscopic exchange in ferromagnetic globular alloy 铁磁球状合金的介观交换
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-07-05 DOI: 10.1016/j.jmmm.2025.173343
Sh.B. Abdulvagidov , L.A. Saypulaeva , A.I. Ril
{"title":"Mesoscopic exchange in ferromagnetic globular alloy","authors":"Sh.B. Abdulvagidov ,&nbsp;L.A. Saypulaeva ,&nbsp;A.I. Ril","doi":"10.1016/j.jmmm.2025.173343","DOIUrl":"10.1016/j.jmmm.2025.173343","url":null,"abstract":"<div><div>In a nano- or micro- film consisting of alternating magnetic and non-magnetic layers, magnetic layers spin-polarize the spontaneous currents in the between paramagnetic layer and, thereby, extra-magnetize themselves. However, only a spin-polarized current has been observed in heterogeneous alloys, but not its magnetizing effect. Unfortunately, there is no experimental proof that spin-polarized current magnetizes mesoscopic globules or clusters. Here we show that the MnAs globules spin-polarize electric current in the Cd<sub>3</sub>As<sub>2</sub>(MnAs)<sub>0.447</sub> globular alloy and additionally magnetizes exchanging by this current. The negative magnetoresistance and the negative non-ohmicity indicate the spin polarization of the current, and the excess magnetization reveals self-magnetizing the globules. We calculated the Cd<sub>3</sub>As<sub>2</sub> forbidden gap from the temperature dependence of the Cd<sub>3</sub>As<sub>2</sub>(MnAs)<sub>0.447</sub> magnetization and, thereby, proved that the spin-polarized current of the Cd<sub>3</sub>As<sub>2</sub> intrinsic electrons extra-magnetizes the MnAs globules. The magnetization increase and high non-ohmicity of Cd<sub>3</sub>As<sub>2</sub>(MnAs)<sub>0.447</sub> at room temperature and low voltages represent globular ferromagnetic alloys as an atractive material to study the spin polarization and non-ohmicity. Such alloys can find applications in nanomagnetoelectronics because they have low coercivity that will be helpful for magnetization manipulation.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173343"},"PeriodicalIF":2.5,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144562975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Critical scaling behavior in skyrmion host ferromagnet Cr1.45Te2 skyrmion宿主铁磁体Cr1.45Te2的临界结垢行为
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-07-04 DOI: 10.1016/j.jmmm.2025.173326
Suman Kalyan Pradhan , Tuhin Debnath , Rui Wu
{"title":"Critical scaling behavior in skyrmion host ferromagnet Cr1.45Te2","authors":"Suman Kalyan Pradhan ,&nbsp;Tuhin Debnath ,&nbsp;Rui Wu","doi":"10.1016/j.jmmm.2025.173326","DOIUrl":"10.1016/j.jmmm.2025.173326","url":null,"abstract":"<div><div>Materials hosting diverse topological spin textures hold significant potential for spintronic applications. In this context, Cr<sub>1.45</sub>Te<sub>2</sub>, a quasi-two-dimensional material, stands out due to its stable Néel-type skyrmion phase over a wide temperature range, both with and without an applied magnetic field [APL 125, 152402 (2024)]. Thus, it is a promising candidate for investigating complex magnetic phenomena, offering valuable insights into the underlying magnetic interactions. This study investigates the critical behavior of Cr<sub>1.45</sub>Te<sub>2</sub> near <span><math><msub><mrow><mi>T</mi></mrow><mrow><mtext>C</mtext></mrow></msub></math></span> by measuring DC magnetic isotherms. A systematic analysis of these isotherms with the magnetic field applied along the easy axis allows us to determine the asymptotic critical exponents: <span><math><mrow><mi>β</mi><mo>=</mo><mn>0</mn><mo>.</mo><mn>314</mn><mo>±</mo><mn>0</mn><mo>.</mo><mn>019</mn></mrow></math></span>, <span><math><mrow><mi>γ</mi><mo>=</mo><mn>1</mn><mo>.</mo><mn>069</mn><mo>±</mo><mn>0</mn><mo>.</mo><mn>055</mn></mrow></math></span>, and <span><math><mrow><mi>δ</mi><mo>=</mo><mn>4</mn><mo>.</mo><mn>386</mn><mo>±</mo><mn>0</mn><mo>.</mo><mn>001</mn></mrow></math></span>, where the Widom scaling law and scaling equations verified the self-consistency and reliability. In this system, the magnetic exchange coupling <span><math><mi>J</mi></math></span> (<span><math><mi>r</mi></math></span>) is the long-range type and decays spatially at a rate slower than approximately <span><math><mrow><mo>≈</mo><msup><mrow><mi>r</mi></mrow><mrow><mo>−</mo><mn>4</mn><mo>.</mo><mn>651</mn></mrow></msup></mrow></math></span>. Most notably, a series of vertical lines in the low-field region of the initial magnetization curves below <span><math><msub><mrow><mi>T</mi></mrow><mrow><mtext>C</mtext></mrow></msub></math></span> supports the existence of a skyrmion phase in this compound.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173326"},"PeriodicalIF":2.5,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144579391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ferromagnetic skyrmionium-based artificial neuron devices using magnetic field gradients 利用磁场梯度的铁磁天基人造神经元装置
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-07-04 DOI: 10.1016/j.jmmm.2025.173321
H. Vigo-Cotrina , S. Navarro-Vilca , S. Urcia-Romero
{"title":"Ferromagnetic skyrmionium-based artificial neuron devices using magnetic field gradients","authors":"H. Vigo-Cotrina ,&nbsp;S. Navarro-Vilca ,&nbsp;S. Urcia-Romero","doi":"10.1016/j.jmmm.2025.173321","DOIUrl":"10.1016/j.jmmm.2025.173321","url":null,"abstract":"<div><div>Skyrmioniums are protected topological textures that have potential applications in spintronics. This study demonstrates the feasibility of simulating an artificial neuron device with leaky-integrate-and-fire (LIF) functionality on a ferromagnetic racetrack using micromagnetic simulations. First, we determine the magnetic field range required to stabilize a skyrmionium. Then, we show that applying a magnetic field gradient enables the controlled displacement of a skyrmionium along the racetrack. Our results indicates that the displacement speed increases with a stronger gradient intensity or a lower damping constant. These findings agree with those predicted by the Thiele equation. We also demonstrate that applying current pulses along with a magnetic field gradient makes it possible to emulate LIF functionality on a racetrack, using skyrmioniums as a fundamental building block.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173321"},"PeriodicalIF":2.5,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144556694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Machine learning investigation of chemical disorder effects in 24-valence-electron full-Heusler alloys with single magnetic element 单磁性24价电子全heusler合金化学无序效应的机器学习研究
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-07-04 DOI: 10.1016/j.jmmm.2025.173322
Yanqi Guo , Chaokun Guo , Yuanji Xu , Bing Zheng , Xiaodong Ni , Fuyang Tian
{"title":"Machine learning investigation of chemical disorder effects in 24-valence-electron full-Heusler alloys with single magnetic element","authors":"Yanqi Guo ,&nbsp;Chaokun Guo ,&nbsp;Yuanji Xu ,&nbsp;Bing Zheng ,&nbsp;Xiaodong Ni ,&nbsp;Fuyang Tian","doi":"10.1016/j.jmmm.2025.173322","DOIUrl":"10.1016/j.jmmm.2025.173322","url":null,"abstract":"<div><div>Most full-Heusler alloys exhibit disordered structures such as B2 or BCC, rather than the ideal ordered <span><math><msub><mrow><mi>L2</mi></mrow><mrow><mn>1</mn></mrow></msub></math></span> or XA structures. It is urgent to explore the intrinsic relationship between magnetism and chemical disorder in these materials. In this study, we combine first-principles calculations and machine learning methods to investigate the influence of chemical disorder on the magnetism of 24-valence-electron X<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>YZ-type alloys. By screening stable compounds containing magnetic elements, we constructed a multidimensional feature set. The gradient boosting machine and random forest were used to establish classification and regression models, respectively. The results indicate that whether X or Y is a magnetic element, the degree of disorder is a key factor determining their magnetic properties. Using the proposed scheme, we successfully predict the magnetic properties of three unstudied compounds—Fe<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>HfSn, Fe<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>YSb, and Co<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>LiAs—achieving an <span><math><msup><mrow><mi>R</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> value as high as 0.97, compared to <span><math><mrow><mi>a</mi><mi>b</mi></mrow></math></span> <span><math><mrow><mi>i</mi><mi>n</mi><mi>i</mi><mi>t</mi><mi>i</mi><mi>o</mi></mrow></math></span> calculations.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173322"},"PeriodicalIF":2.5,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144569934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design, synthesis, characterization and biological evaluation of cobalt-ferrite nanoparticles for biomedical applications 生物医学应用钴铁氧体纳米粒子的设计、合成、表征和生物学评价
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-07-02 DOI: 10.1016/j.jmmm.2025.173336
Ecem Fatma Esmer, Eyüp Bilgi, Selin Çeşmeli Dincay, Tuğçe Sakallı, Ceyda Öksel Karakuş
{"title":"Design, synthesis, characterization and biological evaluation of cobalt-ferrite nanoparticles for biomedical applications","authors":"Ecem Fatma Esmer,&nbsp;Eyüp Bilgi,&nbsp;Selin Çeşmeli Dincay,&nbsp;Tuğçe Sakallı,&nbsp;Ceyda Öksel Karakuş","doi":"10.1016/j.jmmm.2025.173336","DOIUrl":"10.1016/j.jmmm.2025.173336","url":null,"abstract":"<div><div>Cobalt-Ferrite nanoparticles (CF NPs) are increasingly used in biomedical applications due to their unique magnetic properties and biocompatibility. In this study, CF NPs were synthesized via co-precipitation, both in the presence and absence of oleic acid (OA) as a surfactant. Plackett-Burman Design was employed to study the influence of reaction conditions on the particle size distribution of bare and OA-coated CF NPs. Representative bare and OA-coated CF NP samples were characterized for morphology, composition, thermal stability, and optical and magnetic properties using TEM, XRD, FTIR, TGA, UV–Vis, and VSM. The highest saturation magnetization value (∼44 emu/g) was observed for bare CF NPs of smaller sizes. MTT assay results indicated that none of the tested samples showed significant cytotoxicity at the concentrations tested (1, 10, and 100 µg/mL), except for the bare CF NPs, which reduced viability of A549 cells to approximately 50 % following 72-hour exposure at 100 µg/mL. Following incubation in a cell culture medium for 48 h, proteins bound to the surface of CF NPs were analyzed using SDS-PAGE, revealing <em>bovine serum albumin</em>, <em>apolipoprotein A-I</em> and <em>fibronectin</em> as the most abundant proteins across samples. Overall, OA-coating slightly improved colloidal stability and reduced cytotoxicity, without significantly compromising the magnetic or protein-binding properties.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173336"},"PeriodicalIF":2.5,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144556718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信