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Investigation of Impact of the Annealing on Magnetothermal Properties of Zn0.2Mn0.8Fe2O4 Nanoparticles 退火对Zn0.2Mn0.8Fe2O4纳米颗粒磁热性能影响的研究
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2023-01-02 DOI: 10.1109/LMAG.2022.3233222
Nan N. Liu;Yulia A. Alekhina;Alexander P. Pyatakov;Nikolai S. Perov;Boris B. Kovalev;Gleb B. Sukhorukov;Alexander M. Tishin;Tomomasa Moriwaki;Kenta Nakazawa;Yuko Ichiyanagi
{"title":"Investigation of Impact of the Annealing on Magnetothermal Properties of Zn0.2Mn0.8Fe2O4 Nanoparticles","authors":"Nan N. Liu;Yulia A. Alekhina;Alexander P. Pyatakov;Nikolai S. Perov;Boris B. Kovalev;Gleb B. Sukhorukov;Alexander M. Tishin;Tomomasa Moriwaki;Kenta Nakazawa;Yuko Ichiyanagi","doi":"10.1109/LMAG.2022.3233222","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3233222","url":null,"abstract":"Magnetic and magnetothermal properties of annealed Zn\u0000<sub>0.2</sub>\u0000Mn\u0000<sub>0.8</sub>\u0000Fe\u0000<sub>2</sub>\u0000O\u0000<sub>4</sub>\u0000 nanoparticles with diameter value, ranging from 9 to 35 nm, have been investigated and compared with earlier investigated unannealed Zn\u0000<sub>0.2</sub>\u0000Mn\u0000<sub>0.8</sub>\u0000Fe\u0000<sub>2</sub>\u0000O\u0000<sub>4</sub>\u0000 magnetic nanoparticles (MNPs). A single-phase spinel structure was observed in both types of MNPs. It has been demonstrated that for the large annealed Zn\u0000<sub>0.2</sub>\u0000Mn\u0000<sub>0.8</sub>\u0000Fe\u0000<sub>2</sub>\u0000O\u0000<sub>4</sub>\u0000 nanoparticles (24.7, 31.4, 35.1 nm) the value of specific absorption rate (SAR) is proportional to the amplitude of the magnetic field as ∼\u0000<italic>H</i>\u0000<sup>4</sup>\u0000. However, for earlier investigated unannealed Zn\u0000<sub>0.2</sub>\u0000Mn\u0000<sub>0.8</sub>\u0000Fe\u0000<sub>2</sub>\u0000O\u0000<sub>4</sub>\u0000 MNPs, superquadratic dependence SAR ∼\u0000<italic>H</i>\u0000<sup>5</sup>\u0000 have been found starting from 13 nm. Significant change of dependence of the character of SAR\u0000<italic>(d)</i>\u0000 may be explained by low values of hysteresis area of small annealed MNPs and, thus, dominant role of Néel relaxation in these annealed Zn\u0000<sub>0.2</sub>\u0000Mn\u0000<sub>0.8</sub>\u0000Fe\u0000<sub>2</sub>\u0000O\u0000<sub>4</sub>\u0000 nanoparticles.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"14 ","pages":"1-5"},"PeriodicalIF":1.2,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67763010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
IEEE Magnetics Society Information IEEE 磁学学会信息
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2023-01-01 DOI: 10.1109/LMAG.2024.3360173
{"title":"IEEE Magnetics Society Information","authors":"","doi":"10.1109/LMAG.2024.3360173","DOIUrl":"https://doi.org/10.1109/LMAG.2024.3360173","url":null,"abstract":"","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"14 ","pages":"C2-C2"},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10477289","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140181569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
2023 Index IEEE Magnetics Letters Vol. 14 2023 Index IEEE Magnetics Letters Vol.
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2023-01-01 DOI: 10.1109/LMAG.2024.3372428
{"title":"2023 Index IEEE Magnetics Letters Vol. 14","authors":"","doi":"10.1109/LMAG.2024.3372428","DOIUrl":"https://doi.org/10.1109/LMAG.2024.3372428","url":null,"abstract":"","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"14 ","pages":"1-13"},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10477225","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140181491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
IEEE Magnetics Letters Publication Information IEEE Magnetics Letters 出版信息
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2023-01-01 DOI: 10.1109/LMAG.2024.3360177
{"title":"IEEE Magnetics Letters Publication Information","authors":"","doi":"10.1109/LMAG.2024.3360177","DOIUrl":"https://doi.org/10.1109/LMAG.2024.3360177","url":null,"abstract":"","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"14 ","pages":"C3-C3"},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10477290","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140181485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
About the Cover 关于封面
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2023-01-01 DOI: 10.1109/LMAG.2024.3360169
{"title":"About the Cover","authors":"","doi":"10.1109/LMAG.2024.3360169","DOIUrl":"https://doi.org/10.1109/LMAG.2024.3360169","url":null,"abstract":"","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"14 ","pages":"C4-C4"},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10477226","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140181486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
TechRxiv: Share Your Preprint Research with the World! TechRxiv：与世界分享您的预印本研究成果！
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2023-01-01 DOI: 10.1109/LMAG.2024.3379164
{"title":"TechRxiv: Share Your Preprint Research with the World!","authors":"","doi":"10.1109/LMAG.2024.3379164","DOIUrl":"https://doi.org/10.1109/LMAG.2024.3379164","url":null,"abstract":"","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"14 ","pages":"1-1"},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10477288","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140181515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical Study on the Magnetization Characteristics of Chainlike Magnetic Nanoparticles 链状磁性纳米颗粒磁化特性的数值研究
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2022-12-23 DOI: 10.1109/LMAG.2022.3231819
Haochen Zhang;Yi Sun;Zhongzhou Du;Teruyoshi Sasayama;Takashi Yoshida
{"title":"Numerical Study on the Magnetization Characteristics of Chainlike Magnetic Nanoparticles","authors":"Haochen Zhang;Yi Sun;Zhongzhou Du;Teruyoshi Sasayama;Takashi Yoshida","doi":"10.1109/LMAG.2022.3231819","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3231819","url":null,"abstract":"This work investigated chainlike magnetic nanoparticles (CMNPs), which are a type of magnetic nanoparticle (MNP) with a dipole–dipole interaction in which individual nanoparticles are connected to form a chainlike structure. We numerically analyzed the ac magnetization characteristics of the CMNP and the single-core MNP (SMNP) using the Landau–Lifshitz–Gilbert equation. Owing to the magnetic dipole–dipole interaction, the magnetization of the CMNP is approximately 10 times that of the SMNP under a certain excitation field. MNPs with a chainlike structure are thus expected to have enhanced magnetization characteristics and better performance in medical applications. Additionally, it was found that stronger magnetization can be expected from a CMNP connecting 10 or more magnetic cores with a size of approximately 10–12 nm.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"14 ","pages":"1-4"},"PeriodicalIF":1.2,"publicationDate":"2022-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67762119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Integration of Novel High-Frequency Transformer With Silicon-Carbide Schottky Diodes 新型高频变压器与碳化硅肖特基二极管的集成
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2022-12-14 DOI: 10.1109/LMAG.2022.3229230
Weichong Yao;Junwei Lu;Andrew Seagar;Feifei Bai;Foad Taghizadeh
{"title":"Integration of Novel High-Frequency Transformer With Silicon-Carbide Schottky Diodes","authors":"Weichong Yao;Junwei Lu;Andrew Seagar;Feifei Bai;Foad Taghizadeh","doi":"10.1109/LMAG.2022.3229230","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3229230","url":null,"abstract":"This letter presents a novel and compact structure that integrates silicon-carbide (SiC) Schottky diodes within a high-frequency transformer (HFT). The proposed structure would reduce the volume of a power converter and, in turn, the system to which it is applied. It would also greatly reduce the leakage inductances of an HFT as well as the inductive electromagnetic interference to surrounding components and devices. A prototype HFT shaped much like a torus is designed for integration with SiC Schottky diodes. The three-dimensional finite-element method simulation technique is used to design and analyze the magnetic structure of the HFT including the space reserved for the SiC Schottky diodes. Experimental results are presented for both the HFT as a separate component and as a system integrated with SiC Schottky diodes.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"13 ","pages":"1-5"},"PeriodicalIF":1.2,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67902597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Gas Composition During Pt Sputtering on Structural and Magnetic Properties of CoFeB Thin Films Pt溅射过程中气体成分对CoFeB薄膜结构和磁性能的影响
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2022-12-13 DOI: 10.1109/LMAG.2022.3225742
Hans T. Nembach;Justin M. Shaw;Chloe S. Taylor;Daniel B. Gopman
{"title":"Effect of Gas Composition During Pt Sputtering on Structural and Magnetic Properties of CoFeB Thin Films","authors":"Hans T. Nembach;Justin M. Shaw;Chloe S. Taylor;Daniel B. Gopman","doi":"10.1109/LMAG.2022.3225742","DOIUrl":"10.1109/LMAG.2022.3225742","url":null,"abstract":"Ultrathin Ta/CoFeB/Pt trilayer structures are relevant to a wide range of spintronic applications, from magnetic tunnel junctions to skyrmionics devices. Controlling the perpendicular magnetic anisotropy, Gilbert damping, and Dzyaloshinskii–Moriya interaction (DMI) in the CoFeB layer is key for these applications. We examine the role of sputter gas composition during the Pt overlayer deposition of a Ta/CoFeB/Pt trilayer in Ar, Kr, and Xe working gas environments during direct current magnetron sputtering. The decreasing density of the Pt layer (from 21 to 15 g/cm\u0000<sup>3</sup>\u0000) was apparent in specular X-ray reflectivity measurements of the trilayer films when increasing the molecular weight of the sputtering gas from Ar to Kr to Xe. Significant effects on the Gilbert damping and the interfacial DMI energy were observed, with increases in the damping from 0.037(1) to 0.042(1) to 0.048(1), and reductions in the interfacial DMI from 0.47(4) mJ/m\u0000<sup>2</sup>\u0000 to 0.45(5) mJ/m\u0000<sup>2</sup>\u0000 to 0.39(4) mJ/m\u0000<sup>2</sup>\u0000. The ability to control the perpendicular magnetization and DMI strength of these materials through judicious interfacial control is a means toward magnetic devices with better stability at smaller lateral dimensions, the key to device scaling for spintronic device arrays.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"13 ","pages":"1-4"},"PeriodicalIF":1.2,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10161395/pdf/nihms-1880596.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9437969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mean-Field Modeling of Magnetocaloric Effect of Antiferromagnetic Compounds 反铁磁性化合物磁热效应的平均场模型
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2022-12-05 DOI: 10.1109/LMAG.2022.3226918
B. P. Alho;P. O. Ribeiro;R. S. de Oliveira;V. S. R. de Sousa;E. P. Nóbrega;B. C. Margato;J. M. N. da Silva;P. J. von Ranke
{"title":"Mean-Field Modeling of Magnetocaloric Effect of Antiferromagnetic Compounds","authors":"B. P. Alho;P. O. Ribeiro;R. S. de Oliveira;V. S. R. de Sousa;E. P. Nóbrega;B. C. Margato;J. M. N. da Silva;P. J. von Ranke","doi":"10.1109/LMAG.2022.3226918","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3226918","url":null,"abstract":"Antiferromagnetic compounds are known in the literature to present the inverse magnetocaloric effect (MCE). This effect is characterized by the negative adiabatic temperature change \u0000<inline-formula><tex-math>$Delta {T}_S$</tex-math></inline-formula>\u0000 of an antiferromagnetic material when submitted to an applied magnetic field. In an isothermal process, a positive entropy change \u0000<inline-formula><tex-math>$Delta {S}_T$</tex-math></inline-formula>\u0000 is also expected. More recently, the anisotropic character of antiferromagnetic compounds, due to spin-flop and spin-flip transitions, has been pointed out, highlighting the applicability of the antiferromagnetic compounds in a rotary magnetocaloric device. In this work, we systematically investigated a mean-field model that describes the antiferromagnetic behavior of materials in a multisublattice approach. Our model includes the nearest and next-nearest neighbor exchange interaction, the Zeeman effect, and uniaxial anisotropy energy. We investigated the effect of anisotropy on the spin-flop and spin-flip transitions on the usual and anisotropic MCE. We also demonstrated and verified an area rule for \u0000<inline-formula><tex-math>$ - {rm{Delta }}{S}_T$</tex-math></inline-formula>\u0000 versus \u0000<italic>T</i>\u0000 curves that can be used on compounds where the saturation magnetization is magnetic field dependent.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"13 ","pages":"1-4"},"PeriodicalIF":1.2,"publicationDate":"2022-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67741217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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