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Information Degradation during Archiving in Heat-Assisted Magnetic Recording 热辅助磁记录存档过程中的信息退化
Journal of the Magnetics Society of Japan Pub Date : 2021-01-01 DOI: 10.3379/msjmag.2201r003
T. Kobayashi, Y. Nakatani, Y. Fujiwara
{"title":"Information Degradation during Archiving in Heat-Assisted Magnetic Recording","authors":"T. Kobayashi, Y. Nakatani, Y. Fujiwara","doi":"10.3379/msjmag.2201r003","DOIUrl":"https://doi.org/10.3379/msjmag.2201r003","url":null,"abstract":"We examine the dependence of information stability on certain medium parameters, namely mean Curie temperature, grain height, and anisotropy constant ratio in 4 Tbpsi heat-assisted magnetic recording, for 10 years of archiving. We introduce a minimum normalized readout field H 0 after 10 years of archiving and an information degradation rate R 0 during 10 years of archiving. To interpret the results, we investigate whether there is a correlation between H 0 or R 0 and an effective thermal stability factor for 9 and 6 grains/bit. We find that there is a strong correlation since the anisotropy constant is much larger than the shape anisotropy. The H 0 and R 0 values are functions of the effective thermal stability factor and grain number, and are independent of grain number per bit. The effective thermal stability factor necessary for no information degradation is more than about 120. Furthermore, there is a weak correlation between the initial readout field or minimum readout field after 10 years of archiving and the effective thermal stability factor.","PeriodicalId":36791,"journal":{"name":"Journal of the Magnetics Society of Japan","volume":"148 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80654227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Consideration of Magnetostriction Force Calculation for Transformer Core by Using Reluctance Network Analysis 用磁阻网络分析计算变压器铁心磁致伸缩力的考虑
Journal of the Magnetics Society of Japan Pub Date : 2021-01-01 DOI: 10.3379/MSJMAG.2105R009
Y. Hane, K. Nakamura, N. Kurita
{"title":"A Consideration of Magnetostriction Force Calculation for Transformer Core by Using Reluctance Network Analysis","authors":"Y. Hane, K. Nakamura, N. Kurita","doi":"10.3379/MSJMAG.2105R009","DOIUrl":"https://doi.org/10.3379/MSJMAG.2105R009","url":null,"abstract":"In recent years, it has been strongly required to reduce radiated noises from transformer cores used in electric power systems. The noises from transformer cores seem to be mainly caused by magnetostriction. Thus, it is necessary to establish a method for quantitatively calculating the force generated from the magnetostriction (magnetostriction force) with not only high-accuracy but also high-speed. This paper presents that the magnetostriction force is calculated based on a reluctance network analysis (RNA) by using a simple-shape wound core as an object of discussion. The validity of the proposed method is indicated by comparing with calculation results obtained from a finite element method (FEM).","PeriodicalId":36791,"journal":{"name":"Journal of the Magnetics Society of Japan","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89837843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Iron Loss and Hysteresis Properties of Nanocrystalline Magnetic Materials Under High Frequency Inverter Excitation 高频逆变器激励下纳米晶磁性材料的铁损耗和磁滞特性
Journal of the Magnetics Society of Japan Pub Date : 2020-11-01 DOI: 10.3379/msjmag.2011l001
A. Yao, F. Kato, H. Sato
{"title":"Iron Loss and Hysteresis Properties of Nanocrystalline Magnetic Materials Under High Frequency Inverter Excitation","authors":"A. Yao, F. Kato, H. Sato","doi":"10.3379/msjmag.2011l001","DOIUrl":"https://doi.org/10.3379/msjmag.2011l001","url":null,"abstract":"Recently, wide-bandgap (WBG) power semiconductors made of silicon carbide (SiC) and gallium nitride (GaN) have been widely developed as high-speed switching devises. Many researchers have studied novel magnetic materials, such as nanocrystalline magnetic materials (NMMs), for low-loss electric motors and transformers. This study experimentally examines the hysteresis ( B – H ) curve and iron loss properties of the NMM core excited using a pulse width modulation (PWM) inverter at high carrier frequencies on the order of MHz with and without the dead time. For comparison, the magnetic properties of amorphous magnetic materials (AMMs) core are also evaluated. Particularly at high carrier frequencies (approximately 1 MHz), the iron loss of NMM and AMM cores significantly depends on the dead time. Compared with the case of the AMM core, the NMM core suppresses the increasing rate of iron losses caused by the dead time because the area of minor loops in NMM becomes small, particularly in high-frequency regions.","PeriodicalId":36791,"journal":{"name":"Journal of the Magnetics Society of Japan","volume":"101 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80279647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Chromatic Aberration Effect in Refraction of Spin Waves 自旋波折射中的色差效应
Journal of the Magnetics Society of Japan Pub Date : 2020-11-01 DOI: 10.3379/msjmag.2011l003
Tian Li, T. Taniguchi, Y. Shiota, T. Moriyama, T. Ono
{"title":"Chromatic Aberration Effect in Refraction of Spin Waves","authors":"Tian Li, T. Taniguchi, Y. Shiota, T. Moriyama, T. Ono","doi":"10.3379/msjmag.2011l003","DOIUrl":"https://doi.org/10.3379/msjmag.2011l003","url":null,"abstract":"We numerically investigated the refraction property of spin waves (SWs) at thickness step in films with out-ofplane magnetization, in which the SWs propagate isotropically in the film plane. It was confirmed the isotropic SWs were refracted at a thickness step by following the Snell's law. We also found that the refraction angle of SWs of the dipole-exchange mode depends on the resonant frequency, indicating that the chromatic aberration effect should be taken into account in designing magnonic devices.","PeriodicalId":36791,"journal":{"name":"Journal of the Magnetics Society of Japan","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73285061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spin Hall Effect in Topological Insulators 拓扑绝缘体中的自旋霍尔效应
Journal of the Magnetics Society of Japan Pub Date : 2020-11-01 DOI: 10.3379/msjmag.2009rv001
P. Hai
{"title":"Spin Hall Effect in Topological Insulators","authors":"P. Hai","doi":"10.3379/msjmag.2009rv001","DOIUrl":"https://doi.org/10.3379/msjmag.2009rv001","url":null,"abstract":"","PeriodicalId":36791,"journal":{"name":"Journal of the Magnetics Society of Japan","volume":"243 1","pages":"137-144"},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87490382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Media Design for Three-Dimensional Heat-Assisted Magnetic Recording 三维热辅助磁记录介质设计
Journal of the Magnetics Society of Japan Pub Date : 2020-09-01 DOI: 10.3379/msjmag.2009r004
T. Kobayashi, Y. Nakatani, Y. Fujiwara
{"title":"Media Design for Three-Dimensional Heat-Assisted Magnetic Recording","authors":"T. Kobayashi, Y. Nakatani, Y. Fujiwara","doi":"10.3379/msjmag.2009r004","DOIUrl":"https://doi.org/10.3379/msjmag.2009r004","url":null,"abstract":"","PeriodicalId":36791,"journal":{"name":"Journal of the Magnetics Society of Japan","volume":"44 1","pages":"122-128"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87413697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Magneto-optical Imaging Using Bismuth-substituted Iron Garnet Films Prepared by Metal–Organic Decomposition 金属有机分解制备铋取代铁石榴石薄膜的磁光成像
Journal of the Magnetics Society of Japan Pub Date : 2020-09-01 DOI: 10.3379/msjmag.2009rv002
T. Ishibashi
{"title":"Magneto-optical Imaging Using Bismuth-substituted Iron Garnet Films Prepared by Metal–Organic Decomposition","authors":"T. Ishibashi","doi":"10.3379/msjmag.2009rv002","DOIUrl":"https://doi.org/10.3379/msjmag.2009rv002","url":null,"abstract":"","PeriodicalId":36791,"journal":{"name":"Journal of the Magnetics Society of Japan","volume":"24 1","pages":"108-116"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72979330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
MnGa Film with (001) Texture Fabricated on Thermally Oxidized Si Substrate Using CoGa Buffer Layer 用CoGa缓冲层在热氧化硅衬底上制备具有(001)织构的MnGa薄膜
Journal of the Magnetics Society of Japan Pub Date : 2020-09-01 DOI: 10.3379/msjmag.2009r003
Y. Miwa, D. Oshima, T. Kato, S. Iwata
{"title":"MnGa Film with (001) Texture Fabricated on Thermally Oxidized Si Substrate Using CoGa Buffer Layer","authors":"Y. Miwa, D. Oshima, T. Kato, S. Iwata","doi":"10.3379/msjmag.2009r003","DOIUrl":"https://doi.org/10.3379/msjmag.2009r003","url":null,"abstract":"","PeriodicalId":36791,"journal":{"name":"Journal of the Magnetics Society of Japan","volume":"48 24 1","pages":"117-121"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79216621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Flux Growth and Magnetic Properties of Single Crystals of Hexagonal Ferrite Structures and a Long-Range-Order Structure 六方铁氧体结构和长阶结构单晶的磁通生长和磁性能
Journal of the Magnetics Society of Japan Pub Date : 2020-07-01 DOI: 10.3379/msjmag.2007r001
T. Saho, T. Fujihara, K. Kakizaki, K. Kamishima
{"title":"Flux Growth and Magnetic Properties of Single Crystals of Hexagonal Ferrite Structures and a Long-Range-Order Structure","authors":"T. Saho, T. Fujihara, K. Kakizaki, K. Kamishima","doi":"10.3379/msjmag.2007r001","DOIUrl":"https://doi.org/10.3379/msjmag.2007r001","url":null,"abstract":"","PeriodicalId":36791,"journal":{"name":"Journal of the Magnetics Society of Japan","volume":"24 1","pages":"91-95"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77861370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Robustness and Local Polarization Control of Plasmonic Antennas with Fabrication Errors 考虑制造误差的等离子体天线鲁棒性及局部极化控制
Journal of the Magnetics Society of Japan Pub Date : 2020-07-01 DOI: 10.3379/msjmag.2007r003
R. Ohnishi, K. Tatsuzawa, Takashi Yamaguchi, S. Kishimoto, Y. Ashizawa, K. Nakagawa, S. Ohnuki
{"title":"Robustness and Local Polarization Control of Plasmonic Antennas with Fabrication Errors","authors":"R. Ohnishi, K. Tatsuzawa, Takashi Yamaguchi, S. Kishimoto, Y. Ashizawa, K. Nakagawa, S. Ohnuki","doi":"10.3379/msjmag.2007r003","DOIUrl":"https://doi.org/10.3379/msjmag.2007r003","url":null,"abstract":"","PeriodicalId":36791,"journal":{"name":"Journal of the Magnetics Society of Japan","volume":"13 1","pages":"96-101"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73164696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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