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2015 IEEE Magnetics Conference (INTERMAG)最新文献

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Analytical prediction of armature reaction field distribution in PMAC machines with different winding configuration 不同绕组结构PMAC电机电枢反场分布的分析预测
2015 IEEE Magnetics Conference (INTERMAG) Pub Date : 2016-10-01 DOI: 10.1109/VPPC.2016.7791619
L. Li, J. Yu, J. Cao
{"title":"Analytical prediction of armature reaction field distribution in PMAC machines with different winding configuration","authors":"L. Li, J. Yu, J. Cao","doi":"10.1109/VPPC.2016.7791619","DOIUrl":"https://doi.org/10.1109/VPPC.2016.7791619","url":null,"abstract":"An improved approach for predicting the armature reaction field in Permanent-Magnet AC (PMAC) machines is presented, and eddy current reaction is take into account. Winding configuration of PM machines could be various, such as concentric winding or lap winding, integral or fractional slot winding, distributed or concentrated winding, single-layer or double-layer winding. Starting with the field produced by coil, a mathematical relation is formulated between the winding field and the coil field by solving Maxwell's equations in each subdomain and applying boundary and continuity conditions. Significantly, each single coil is dealt with the pre-arranged algebraization and categorisation. As a result, an accurate solution of both radial and tangential components of the flux density can be obtained. Good agreement between predictions and finite element method (FEM) is achieved.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129986619","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
Study of [Co/Ni]N/[Co/Pt]N-based spin valves with perpendicular magnetic anisotropy 垂直磁各向异性[Co/Ni]N/[Co/Pt]N基自旋阀的研究
2015 IEEE Magnetics Conference (INTERMAG) Pub Date : 2016-02-12 DOI: 10.1080/10584587.2016.1165567
H. Ju, B. Li, Z. Wu, F. Zhang, G. Yu
{"title":"Study of [Co/Ni]N/[Co/Pt]N-based spin valves with perpendicular magnetic anisotropy","authors":"H. Ju, B. Li, Z. Wu, F. Zhang, G. Yu","doi":"10.1080/10584587.2016.1165567","DOIUrl":"https://doi.org/10.1080/10584587.2016.1165567","url":null,"abstract":"[Co/Ni]N and [Co/Pt]N multilayers are ideal perpendicular magnetic anisotropy materials due to their high spin polarization. There are strong perpendicular magnetic anisotropy(PMA) energy between Co and Ni or Pt layer, and if the energy is strong enough to overcome the demagnetizing effect the easy magnetization axis can be perpendicular to the film[1-3]. Perpendicularly magnetized spin valve structure can be prepared by these properties and it has significant implication in high density magnetoresistive random access memory(MRAM) and other aspects[4]. In this work, a perpendicularly magnetized spin valve structure was developed, consisted the ferromagnetic [Co/ Ni] and [Co/Pt] multilayers and separated by a Au spacer. The magnetoresistance(MR) of the samples with the thickness of Au and the layer repetition number of N was studied.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131346381","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
Quantitative comparison of permanent magnet linear machines for ropeless elevator 无绳电梯用永磁直线电机的定量比较
2015 IEEE Magnetics Conference (INTERMAG) Pub Date : 2015-11-01 DOI: 10.1109/IECON.2015.7392945
H. Fan, K. Chau, Chunhua Liu, Zhen Zhang, C. Qiu
{"title":"Quantitative comparison of permanent magnet linear machines for ropeless elevator","authors":"H. Fan, K. Chau, Chunhua Liu, Zhen Zhang, C. Qiu","doi":"10.1109/IECON.2015.7392945","DOIUrl":"https://doi.org/10.1109/IECON.2015.7392945","url":null,"abstract":"Ropeless elevators have developed very quickly in recent years. There are two main drawbacks of the conventional elevators with rope, especially when they are used in skyscrapers of 250-400m high [1]. One problem is that the space occupancy of the total floor space would be more than 30% in buildings over 250m high [2]. Another drawback is that controlling the elevator in tall buildings is difficult due to the mass and vertical vibration of the steel cable. As the key part of ropeless elevator system, linear machine is very suitable due to its little limitation on building height and space requirement [3]. And the permanent magnet linear machines attract more and more attention due to the high torque density and efficiency.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133136634","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: 3
Microscopic mechanism and calculation of electromagnetically induced acoustic emission 电磁感应声发射的微观机理及计算
2015 IEEE Magnetics Conference (INTERMAG) Pub Date : 2015-07-16 DOI: 10.1109/INTMAG.2015.7156959
Z. Cai, S. Liu, C. Zhang, Q. Yang
{"title":"Microscopic mechanism and calculation of electromagnetically induced acoustic emission","authors":"Z. Cai, S. Liu, C. Zhang, Q. Yang","doi":"10.1109/INTMAG.2015.7156959","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7156959","url":null,"abstract":"The mechanism of electromagnetically induced acoustic emission (EMAE), a nondestructive testing method, is studied at a microscopic level from the viewpoint of energy. The relationship between the generation condition of EMAE and the drop of flow stress in metals under electrical loading is presented. A general theory which correlates acoustic emission with the electroplastic effect is obtained.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"251 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121880664","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
The third dimension: Vortex core reversal by interaction with ‘flexure modes’ 第三维度:与“弯曲模态”相互作用的涡旋核反转
2015 IEEE Magnetics Conference (INTERMAG) Pub Date : 2015-07-16 DOI: 10.1109/INTMAG.2015.7157561
M. Noske, H. Stoll, M. Fahnle, M. Weigand, G. Dieterle, J. Forster, A. Gangwar, A. Slavin, C. Back, G. Schutz
{"title":"The third dimension: Vortex core reversal by interaction with ‘flexure modes’","authors":"M. Noske, H. Stoll, M. Fahnle, M. Weigand, G. Dieterle, J. Forster, A. Gangwar, A. Slavin, C. Back, G. Schutz","doi":"10.1109/INTMAG.2015.7157561","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7157561","url":null,"abstract":"This study discusses the interactions of azimuthal spin wave modes and vortex core reversal with flexure modes. Vortex core reversal in Permalloy discs is observed by scanning transmission X-ray microscopy and analyzed by micromagnetic simulation. Experimental and simulation results indicate that there is a dominant 3D switching mechanism responsible for the asymmetry observed in the interactions.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131269949","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
Simulation of temperature distribution around media heat spot in heat assisted magnetic recording 热辅助磁记录介质热斑周围温度分布的模拟
2015 IEEE Magnetics Conference (INTERMAG) Pub Date : 2015-07-16 DOI: 10.1109/INTMAG.2015.7157146
Houbin Li, Guoqing Zhang, Shengnan Shen, Hao Zheng, Shijing Wu
{"title":"Simulation of temperature distribution around media heat spot in heat assisted magnetic recording","authors":"Houbin Li, Guoqing Zhang, Shengnan Shen, Hao Zheng, Shijing Wu","doi":"10.1109/INTMAG.2015.7157146","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7157146","url":null,"abstract":"The super-fast growth in recording areal density and the correlative decrease of the exterior dimension has been greatly beneficial to the widespread use of hard disk drives (HDDs). In the pursuit of high areal recording density, the heat assisted magnetic recording (HAMR) has been promised to be a new and feasible technology for the next generation of HDDs. In this paper, the temperature distribution around media heat spot in HAMR drive is studied. Firstly, a three-dimensional HAMR drive finite element model consisting of the disk, voice coil motor (VCM), suspension, slider, and filter is built. Then, the flow characteristics and temperature distributions in HAMR drives filled with air and helium are investigated respectively. Finally, the cooling effects of the high speed disk rotation and the heat convection in head-disk interface (HDI) are analyzed and compared.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"s3-30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130136284","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 novel high-sensitivity cardiac multi-biomarkers detecting system based on microfluidic chip and GMR sensor 一种基于微流控芯片和GMR传感器的高灵敏度心脏多生物标志物检测系统
2015 IEEE Magnetics Conference (INTERMAG) Pub Date : 2015-07-16 DOI: 10.1109/INTMAG.2015.7156941
W. Huo, Y. Gao, L. Zhang, S. Shi
{"title":"A novel high-sensitivity cardiac multi-biomarkers detecting system based on microfluidic chip and GMR sensor","authors":"W. Huo, Y. Gao, L. Zhang, S. Shi","doi":"10.1109/INTMAG.2015.7156941","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7156941","url":null,"abstract":"Giant magnetoresistance (GMR) is a quantum mechanical magnetoresistance effect observed in thin-film structures composed of alternating ferromagnetic and non-magnetic conductive layers. Today GMR has been used in various fields including detecting DNA hybridization and pathogenic microorganism[1], screening diagnostic biomarkers[2], detecting HBV genotypes[3], and so on. NT-proBNP is an established risk factor in patients with heart failure or coronary disease. cTnI is considered the standard biomarker for acute myocardial infarction(AMI). The combined detection of NT-proBNP and cTnI could improve the sensitivity and specificity in clinical diagnosis of myocardial injury.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130461730","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: 3
Variation of structure and magnetic properties by Ag addition in (001) oriented CoPt and CoPd alloy film (001)取向CoPt和CoPd合金薄膜中Ag的加入对其结构和磁性能的影响
2015 IEEE Magnetics Conference (INTERMAG) Pub Date : 2015-07-16 DOI: 10.1109/INTMAG.2015.7156686
T. Nagata, Y. Tokuoka, T. Kato, D. Oshima, S. Iwata
{"title":"Variation of structure and magnetic properties by Ag addition in (001) oriented CoPt and CoPd alloy film","authors":"T. Nagata, Y. Tokuoka, T. Kato, D. Oshima, S. Iwata","doi":"10.1109/INTMAG.2015.7156686","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7156686","url":null,"abstract":"Tetragonal L10 phase magnetic materials, e.g., FePt and CoPt, have been extensively studied as potential candidates for future high-density perpendicular recording media. However, for the practical application of these materials, there still remain challenges such as fabrication of nano-sized grains, control of (001) orientation, and lowering the ordering temperature of L10 phase. One of the effective ways to realize these requirements is the addition of the third element, and Ag is known to be one of the effective elements to tailor the magnetic properties and ordering temperature of L10-FePt [1-3]. We have previously studied the effect of Ag addition in L10-FePt and L10-FePd, and found a significant difference in the effect of Ag addition between FePt and FePd; for FePt, Ag addition enhanced the coercivity and promoted L10 ordering, while for FePd, Ag addition lowered the coercivity. In this study, CoPt-Ag and CoPd-Ag systems have been studied in detail for the systematic understanding of the effect of Ag addition in 3d transition metal and noble metal alloy films.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134236748","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
Ferromagnetic behaviour from anionic complexes of carbon and boron 碳硼阴离子配合物的铁磁行为
2015 IEEE Magnetics Conference (INTERMAG) Pub Date : 2015-07-16 DOI: 10.1109/INTMAG.2015.7157589
M. Rowe, E. Skoropata, R. Desautels, J. van Lierop
{"title":"Ferromagnetic behaviour from anionic complexes of carbon and boron","authors":"M. Rowe, E. Skoropata, R. Desautels, J. van Lierop","doi":"10.1109/INTMAG.2015.7157589","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7157589","url":null,"abstract":"Anionic element reagent complexes (AERCs) are a new chemical construct that has already shown remarkable functionality for the synthesis of challenging ferromagnetic nanoparticles (e.g. the low temperature phase of MnBi nanoparticles). The fundamental compositional characteristic of an AERC is the complexation of an element by lithium borohydride (LiBH4). Complexation by LiBH4 results in electron density being transferred from the Li ions to the complexed element. Normally, this association is brief because a reducible cationic-form of the complexed element is used, and a rapid reduction occurs (ie . Fe2+ is quickly reduced to Fe0). In the scenarios of AERCs described here, the complexed element is already zero valent, so a stable complex (at ambient temperature) is formed; creating a situation where the complexed element is the recipient of transferred electron density. Nonmetallic carbon and boron examples of AERCs (referred to as CAERC and B-AERC, respectively) have been synthesized and characterized. We report the mechanochemical combination of parent diamagnetic species (LiBH4 and either carbon or boron) that forms novel, single-phased nonmetallic compounds that present ferromagnetic qualities such as temperature dependent magnetizations, susceptibilities and coercivities (e.g. C-AERC: 160 Oe at 10 K to 20 Oe at 400 K).","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124332830","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
High efficient permanent magnet actuator design by mitigating irreversible demagnetization effect 高效永磁执行器设计，减轻不可逆退磁效应
2015 IEEE Magnetics Conference (INTERMAG) Pub Date : 2015-07-16 DOI: 10.1109/INTMAG.2015.7157614
S. Lim, S. Min, J. Hong
{"title":"High efficient permanent magnet actuator design by mitigating irreversible demagnetization effect","authors":"S. Lim, S. Min, J. Hong","doi":"10.1109/INTMAG.2015.7157614","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7157614","url":null,"abstract":"This paper proposed a new design method for high efficient permanent magnet actuator with considering the irreversible demagnetization of magnet. The nonlinear B-H characteristic of magnet, which is determined by the driving temperature and the reactive magnetic field strength, is applied to predict the magnetic performance of the actuator in a practical driving condition. The optimization problem is formulated to minimize the demagnetized magnet area at the load state while the target magnetic performance is achieved. To obtain the clear boundaries of optimal magnet distribution, a level set function is employed as the topological design variable. An actuator design example will show the usefulness of the proposed method and a way to reduce the permanent damage of magnet.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125230614","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
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