Journal of Magnetism and Magnetic Materials最新文献_第7页

Crystalline electric field and anomalous Hall effect in topological semimetal PrGaSi 拓扑半金属PrGaSi晶体电场与反常霍尔效应

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-08 DOI: 10.1016/j.jmmm.2025.173022

Rajesh Swami , Daloo Ram , Z. Hossain

{"title":"Crystalline electric field and anomalous Hall effect in topological semimetal PrGaSi","authors":"Rajesh Swami , Daloo Ram , Z. Hossain","doi":"10.1016/j.jmmm.2025.173022","DOIUrl":"10.1016/j.jmmm.2025.173022","url":null,"abstract":"<div><div>We report the physical properties of PrGaSi single crystals through x-ray diffraction (XRD), magnetic, heat capacity, magnetoresistance, and Hall resistivity measurements. Powder XRD data reveal that PrGaSi crystallizes in LaPtSi-type tetragonal structure with space group <span><math><mrow><mi>I</mi><msub><mrow><mn>4</mn></mrow><mrow><mn>1</mn></mrow></msub></mrow></math></span><em>md</em>. Magnetic susceptibility measurements indicate a magnetic phase transition near 23 K, which is further corroborated by heat capacity and electrical resistivity data. Magnetization data also reveal pronounced magnetocrystalline anisotropy in PrGaSi, attributed to the influence of the crystalline electric field (CEF). Our CEF analysis indicates that the <span><math><mi>J</mi></math></span> = 4 multiplet of Pr<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span> splits into five singlets and two doublets with an overall splitting of <span><math><mo>∼</mo></math></span> 150 K. The electrical resistivity and heat capacity data in the ordered state show a gapped-magnon behavior with an energy gap of <span><math><mi>Δ</mi></math></span> <span><math><mo>∼</mo></math></span> 12.7 K. We observed an anomalous Hall effect (AHE) in Hall resistivity along <span><math><mi>B</mi></math></span> <span><math><mo>∥</mo></math></span> <span><math><mi>c</mi></math></span>. A large AHE in PrGaSi is explained through scaling analysis between the anomalous Hall resistivity and longitudinal resistivity suggesting dominance of skew scattering.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"624 ","pages":"Article 173022"},"PeriodicalIF":2.5,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835375","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

Kinetic superexchange in a pair of pseudo-Jahn-Teller magnetic ions: Ferro- vs antiferromagnetic coupling 伪jahn - teller磁性离子对的动力学超交换：铁与反铁磁耦合

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-08 DOI: 10.1016/j.jmmm.2025.173044

Andrew Palii , Boris Tsukerblat

{"title":"Kinetic superexchange in a pair of pseudo-Jahn-Teller magnetic ions: Ferro- vs antiferromagnetic coupling","authors":"Andrew Palii , Boris Tsukerblat","doi":"10.1016/j.jmmm.2025.173044","DOIUrl":"10.1016/j.jmmm.2025.173044","url":null,"abstract":"<div><div>The main focus of this paper is to reveal the influence of the pseudo-Jahn-Teller effect (PJTE) on the exchange interaction in a pair of magnetic ions having a degenerate or pseudo-degenerate ground state. We consider the combined effect of the Anderson’s type kinetic exchange (that is called superexchange) between the two one-electron centers each having two nearly-degenerate low-lying magnetic orbitals mixed by the vibration of a suitable symmetry. The superexchange is assumed to be comparable with the energy gap between the two orbitals. Under such condition the electronic energy spectrum of the dimer is shown to consist of three superimposed pairs of <em>S</em> = 1 and <em>S</em> = 0 levels, with the order of the levels inside each group obeying Goodenough-Kanamori rules. The overall effect of superexchange is antiferromagnetic if the energy gap between the two orbitals is large as compared with the superexchange and it is ferromagnetic otherwise. The PJT effect proves to be spin-dependent that drastically modifies the energy pattern arising from the superexchange. The most spectacular effect of the vibronic coupling is the predicted possibility of changing spin of the dimer. In all cases strong PJT coupling stabilizes an antiferromagnetic ground state. We demonstrate that depending on the electronic parameters involved, one of the two types of minima proves to be the global one. One of these types describes ferrodistortive antiferromagnetic state, while for other one the system proves to be ferromagnetic and antiferrodistortive. In a broader context, these results show that a dimeric PJT cluster can serve as a molecular model for interconnected cooperative phenomena in PJT crystals such as magnetic, structural and orbital types of ordering.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"624 ","pages":"Article 173044"},"PeriodicalIF":2.5,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143825780","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

Modeling and experimental validation of transient surface roughness in magnetorheological finishing using 3-D magnetic flux density 基于三维磁通密度的磁流变精整瞬态表面粗糙度建模与实验验证

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-07 DOI: 10.1016/j.jmmm.2025.173004

Moshahid Raza , Ritwik Mondal , Zafar Alam , Arun Dayal Udai

{"title":"Modeling and experimental validation of transient surface roughness in magnetorheological finishing using 3-D magnetic flux density","authors":"Moshahid Raza , Ritwik Mondal , Zafar Alam , Arun Dayal Udai","doi":"10.1016/j.jmmm.2025.173004","DOIUrl":"10.1016/j.jmmm.2025.173004","url":null,"abstract":"<div><div>Mathematical modeling of finishing processes is a way of getting a scientific framework for understanding and controlling the process parameters that influence the result. It enables better optimization and predictability of outcomes like surface roughness, improving quality and efficiency. This paper presents a mathematical model for transient surface roughness in the magnetorheological finishing (MRF) process. The MRF fluid is the main component of this process, containing ferromagnetic and abrasive particles. It forms a cross-linked chain-like structure in the influence of magnetism. These chains are assumed to be similar to the HCP crystal structure. Each HCP chain’s position is calculated with respect to the central axis of the cylindrical permanent magnet. 3-D magnetic flux density is considered to estimate the accurate variation of it across the axial and radial direction of the magnet within the working gap of the MRF tool tip and workpiece. The modeled total magnetic flux density (<span><math><msub><mrow><mi>B</mi></mrow><mrow><mi>T</mi></mrow></msub></math></span>) is validated and found to be 3.93% less and 4.07% more than the total magnetic flux density using the Tesla meter and simulation, respectively. The axial magnetic force is calculated based on the axial magnetic flux density that acts on the abrasive particles through ferromagnetic particles. Hardness for nano-indentation is modeled and utilized in the transient material removal rate (MRR) model. Further modeling of transient surface roughness is formulated based on the MRR model. The formulated theoretical model of MRR and surface roughness are in close agreement with the experimental values with R-squared of 0.991 and 0.953, respectively.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"624 ","pages":"Article 173004"},"PeriodicalIF":2.5,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143807182","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

A comprehensive study of RE ions Ho doped Ni-Zn nanoferrites synthesized by sol–gel auto-combustion techniques 溶胶-凝胶自燃烧技术合成稀土离子掺杂镍锌纳米铁氧体的综合研究

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-07 DOI: 10.1016/j.jmmm.2025.173042

N. Jahan , M.N.I. Khan , M.A. Ali , M.M. Hossain , M.S. Aktar , M.R. Hasan , Md. Akhtaruzzaman , M.M. Uddin

{"title":"A comprehensive study of RE ions Ho doped Ni-Zn nanoferrites synthesized by sol–gel auto-combustion techniques","authors":"N. Jahan , M.N.I. Khan , M.A. Ali , M.M. Hossain , M.S. Aktar , M.R. Hasan , Md. Akhtaruzzaman , M.M. Uddin","doi":"10.1016/j.jmmm.2025.173042","DOIUrl":"10.1016/j.jmmm.2025.173042","url":null,"abstract":"<div><div>High resistivity along with excellent magnetic properties are essential for the use of Ni-Zn nanoferrites in high-frequency applications. The addition of rare-earth (RE) ions Ho<sup>3+</sup> to Ni-Zn ferrites has resulted in structural distortion and changes in electrical and magnetic properties. In this regards, polycrystalline Ho-substituted Ni<sub>0.5</sub>Zn<sub>0.5</sub>Ho<em><sub>x</sub></em>Fe<sub>2-</sub><em><sub>x</sub></em>O<sub>4</sub> (0 ≤ <em>x</em> ≤ 0.20 in the step of 0.04) were synthesized by the sol–gel approach. The samples were examined using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and Fourier transform infrared spectroscopy (FTIR). The Physical Properties Measuring System (PPMS) was utilized to test magnetic properties. The samples’ purity and single-phase was verified by XRD, FESEM, and EDS. While the lattice constant, porosity, and specific surface area increased as the Ho<sup>3+</sup> ion concentration rose, the bulk density and particle size decreased. Both the average grain size (52–17 nm) and crystallite size decreases with increasing Ho<sup>3+</sup>. DC resistivity of ferrites made by the conventional method was at least four orders of magnitude higher, at order 10<sup>10</sup> Ω-cm. The extremely small grain size causing this discrepancy is properly described by the Maxwell-Wagner hopping conduction model. Applying the Cole-Cole plot, we have elucidated function of grain and grain boundary resistance. Ferrites may be used in high-frequency eddy current loss mitigation devices because of their high resistivity. The findings of this investigation point to the materials’ possible use in a high-frequency magnetic device.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"624 ","pages":"Article 173042"},"PeriodicalIF":2.5,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820276","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

Studies on structural, magnetic and corrosion properties of Novel Co35Cr5Fe10Ni30Ti5Al10-x Mn5+x (x = 0, 2.5, 5) high entropy alloys 新型Co35Cr5Fe10Ni30Ti5Al10-x Mn5+x （x = 0,2.5, 5）高熵合金的结构、磁性和腐蚀性能研究

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-07 DOI: 10.1016/j.jmmm.2025.173035

Priyanka Kumari, Shashi Kant Mohapatra, Rohit R. Shahi

{"title":"Studies on structural, magnetic and corrosion properties of Novel Co35Cr5Fe10Ni30Ti5Al10-x Mn5+x (x = 0, 2.5, 5) high entropy alloys","authors":"Priyanka Kumari, Shashi Kant Mohapatra, Rohit R. Shahi","doi":"10.1016/j.jmmm.2025.173035","DOIUrl":"10.1016/j.jmmm.2025.173035","url":null,"abstract":"<div><div>We investigated the effect of the presence of both Mn and Al on magnetic and corrosion properties of Co<sub>35</sub>Cr<sub>5</sub>Fe<sub>10</sub>Ni<sub>30</sub>Ti<sub>5</sub>Al<sub>10-x</sub>Mn<sub>5+x</sub> (x = 0, 2.5, 5) High Entropy Alloys (HEAs). Three different HEAs were synthesized through the mechanical alloying technique and investigated for the phase formation, and its correlation with the magnetic properties. At the as synthesized stage a single fcc phase is formed due to the addition of 7th alloying element in Co<sub>35</sub>Cr<sub>5</sub>Fe<sub>10</sub>Ni<sub>30</sub>Ti<sub>5</sub>Al<sub>10-x</sub> Mn<sub>5+x</sub> (x = 0, 2.5, 5) HEAs. However, after annealing at 700 ̊C for 2 h, a small amount of bcc and σ-phase are precipitated along with the fcc phase for the Co<sub>35</sub>Cr<sub>5</sub>Fe<sub>10</sub>Ni<sub>30</sub>Ti<sub>5</sub>Al<sub>10-x</sub>Mn<sub>5+x</sub> (x = 0, 2.5, 5) HEAs. The value of Ms and Hc are found 73 emu/g & 18 Oe, 71 emu/g & 15 Oe and 71 emu/g & 17 Oe for the as- synthesized Co<sub>35</sub>Cr<sub>5</sub>Fe<sub>10</sub>Ni<sub>30</sub>Ti<sub>5</sub>Al<sub>10-x</sub> Mn<sub>5+x</sub> HEAs (x = 0, 2.5, 5) respectively. However, after annealing of the as synthesized HEA at 700℃ 2 h, the value of Ms (102–106 emu/g), Hc (47–49 Oe) and Mr (2.26–2.48 emu/g) are increased significantly. The increment in the value of Ms for the annealed HEAs is associated with the decrease in the lattice parameter and dislocation density of the fcc phase as compared to the as- synthesized HEAs. We also investigated the corrosion resistance of annealed Co<sub>35</sub>Cr<sub>5</sub>Fe<sub>10</sub>Ni<sub>30</sub>Ti<sub>5</sub>Al<sub>10-x</sub> Mn<sub>5+x</sub> (x = 0, 2.5, 5) HEAs and found good corrosion resistance for the developed HEA as compared to the recently reported HEAs and conventional soft magnetic materials.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"624 ","pages":"Article 173035"},"PeriodicalIF":2.5,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817634","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

Nonzero RMS magnetoresistance yielding control space partition of CrTe2 monolayer CrTe2单层非零均方根磁阻产生的控制空间划分

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-06 DOI: 10.1016/j.jmmm.2025.173040

Chee Kian Yap , Arun Kumar Singh

{"title":"Nonzero RMS magnetoresistance yielding control space partition of CrTe2 monolayer","authors":"Chee Kian Yap , Arun Kumar Singh","doi":"10.1016/j.jmmm.2025.173040","DOIUrl":"10.1016/j.jmmm.2025.173040","url":null,"abstract":"<div><div>The study of magnetic phenomena in low-dimensional systems has largely explored after the discovery of two-dimensional (2D) magnetic materials, such as CrI<sub>3</sub> and Cr<sub>2</sub>Ge<sub>2</sub>Te<sub>6</sub> in 2017. These materials presents intrinsic magnetic order, overcoming the limitations predicted by the Mermin-Wagner theorem, due to magnetic crystalline anisotropy energy. Among these, CrTe<sub>2</sub>, a van der Waals 2D magnet, has gather significant interest due to its in-plane anisotropic magnetoresistance (AMR) and high Curie temperature. This study investigates the magnetic field-regulated resistance of CrTe<sub>2</sub> monolayers in the context of spintronics applications. Utilizing the zigzag-ordered parameters obtained from prior simulations, we examine how external magnetic fields influence resistance states and control the ON/OFF state of nano-devices. The analysis demonstrates that specific magnetic field configurations, particularly those in the form of (0, 0, Bz(ω)), which is out-of-plane directed field, gives a non-zero root mean square resistance, indicating a functional resistance ON state. This provides a novel method for magnetically controlled current regulation in spintronic devices. The experimental results also reveal an interesting spin-flop transition in CrTe<sub>2</sub> under a z-directed magnetic field, leading to y-directional magnetization. This phenomenon, combined with the material’s robust magnetic properties, positions CrTe<sub>2</sub> as a promising candidate for next-generation memory and logic devices. By advancing the understanding of magnetic field manipulation in 2D magnetic materials, this research opens new pathways in the development of energy-efficient spintronics technology.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"624 ","pages":"Article 173040"},"PeriodicalIF":2.5,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling of ultra thin polarization insensitive dual band metamaterial absorber for shielding and sensing application 用于屏蔽和传感应用的超薄偏振不敏感双波段超材料吸收器的建模

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-06 DOI: 10.1016/j.jmmm.2025.173041

Sonu Jain, Mamta Devi Sharma, Ritu Sharma

{"title":"Modelling of ultra thin polarization insensitive dual band metamaterial absorber for shielding and sensing application","authors":"Sonu Jain, Mamta Devi Sharma, Ritu Sharma","doi":"10.1016/j.jmmm.2025.173041","DOIUrl":"10.1016/j.jmmm.2025.173041","url":null,"abstract":"<div><div>In this paper a dual band Metamaterial absorber developed for 5G (n78), WiMAX (Worldwide Interoperability for Microwave Access), and Wireless Local Area Networks (WLAN). The Fr4 substrate integrates two Metamaterial resonators. A crossed Z-shaped structure is specifically designed to absorb electromagnetic waves at a frequency of 3.5 GHz. In addition, a resonator in the shape of a square loop is responsible for absorbing waves in a second frequency band at 2.4 GHz. The top and bottom metallic layers are designed in such a way that radio frequency (RF) waves impinge on the dielectric surface. The resonance phenomena of the suggested structure were confirmed by employing an equivalent circuit model. Surface current analysis was also used to validate the metamaterial properties of the suggested structure. The suggested absorber’s absorption was confirmed under TE and TM polarization at various incidence angles. The investigations show that absorption is more than 99.99 % at 2.4 GHz and 3.5 GHz. Further metamaterial properties of the structure were investigated by finding negative refractive indexes at 2.4 GHz and 3.5 GHz. Moreover, analysis also confirmed the effectiveness of the designed absorber in a sensing application.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"624 ","pages":"Article 173041"},"PeriodicalIF":2.5,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143825781","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

Influence of Fe3+ and Co2+ co-doping on the electrical, magnetodielectric, and multiferroic properties of lead-free Ba0.7Sr0.3TiO3 ceramics Fe3+和Co2+共掺杂对无铅Ba0.7Sr0.3TiO3陶瓷电学、磁介电和多铁性能的影响

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-05 DOI: 10.1016/j.jmmm.2025.173030

Arbaz Reyaz Khan, Sumit Bhardwaj, Sanjeev Kumar

{"title":"Influence of Fe3+ and Co2+ co-doping on the electrical, magnetodielectric, and multiferroic properties of lead-free Ba0.7Sr0.3TiO3 ceramics","authors":"Arbaz Reyaz Khan, Sumit Bhardwaj, Sanjeev Kumar","doi":"10.1016/j.jmmm.2025.173030","DOIUrl":"10.1016/j.jmmm.2025.173030","url":null,"abstract":"<div><div>This study explores the ambient temperature multiferroic behavior in lead-free Ba<sub>0.7</sub>Sr<sub>0.3</sub>TiO<sub>3</sub> ceramics co-doped with transition metal ions (Fe<sup>3+</sup> and Co<sup>2+</sup>) synthesized via the solid-state reaction (SSR) method. The research systematically investigates the effects of transition metal co-doping on the structural, ferroelectric, dielectric, magnetic, and magnetodielectric properties of the ceramics. X-ray diffraction (XRD) analyses confirmed the formation of a monophasic crystalline structure with <em>P4mm</em> space group symmetry across all compositions. Raman spectroscopy further supported the presence of single-phase crystallinity, consistent with the XRD results. Scanning electron microscopy (SEM) revealed a decrease in grain size due to the incorporation of transition metal ions. Dielectric properties, measured across a frequency range of 1 kHz to 1 MHz, demonstrated frequency-dependent behavior. Ferroelectric P–E hysteresis curves exhibited a consistent reduction in polarization (P<sub>s</sub> and P<sub>r</sub>), while magnetic M−H loops showed an enhancement in magnetic properties. Magnetodielectric (MD) analysis validated the coupling between ferromagnetic and ferroelectric ordering. The sample exhibited significant magnetodielectric effects, demonstrating a notable MC% value of 5.83 %. These findings highlight the potential of this co-doped BST ceramic for use in advanced non-volatile multiferroic memory devices.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"624 ","pages":"Article 173030"},"PeriodicalIF":2.5,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792504","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

Three-dimensional ferrimagnetic ground state of triangular-lattice system Ca3Co2O6 三角形晶格体系Ca3Co2O6的三维铁磁基态

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-05 DOI: 10.1016/j.jmmm.2025.173000

Santanu De , Biswajit Dutta , V.R. Reddy , A. Banerjee

{"title":"Three-dimensional ferrimagnetic ground state of triangular-lattice system Ca3Co2O6","authors":"Santanu De , Biswajit Dutta , V.R. Reddy , A. Banerjee","doi":"10.1016/j.jmmm.2025.173000","DOIUrl":"10.1016/j.jmmm.2025.173000","url":null,"abstract":"<div><div>High temperature one-dimensional (1D) ferromagnetic (FM) chains in Ca<sub>3</sub>Co<sub>2</sub>O<sub>6</sub> spin system are subjected to a magnetic field and temperature induced first order phase transition (FOPT) to 3D ferrimagnetic (FIM) ground state with decrease in temperature (T) at lower magnetic field. Weak-FM interaction of third-nearest-neighbor (nn) interchains removes the frustration effect arising from predominant antiferromagnetic (AFM) interactions of first-nn and second-nn interchains in the underlying triangular-lattice resulting a 3D FIM ordering of 1D FM chains at low T. However, hindered kinetics of FOPT partially masks this transformation giving rise to coexistence of non-interacting 1D FM chains with 3D FIM state at low T. The complex exchange pathways of the 3D FIM state is further substantiated by random substitution of S = 5/2 magnetic-impurity into the spin chains of original system. It reveals weakening of FM interactions of both intrachain and third-nn surrounding chains, respectively, without significant modulation in the AFM coupling of first-nn and second-nn interchains. Thus, the effect of AFM interactions is enhanced as compared to FM couplings with increase of S = 5/2 impurities resulting instability of 3D long-range FIM state at low T.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"624 ","pages":"Article 173000"},"PeriodicalIF":2.5,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817636","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

The effect of non-uniform quenching on the surface domain structure of amorphous Fe-based microwires 非均匀淬火对非晶铁基微线表面结构的影响

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-05 DOI: 10.1016/j.jmmm.2025.173032

O.I. Aksenov , S.I. Bozhko , A.A. Fuks , A.S. Aronin

引用次数: 0