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INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.最新文献

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Development of woofer microspeakers used cellular phones 利用移动电话开发低音炮微型扬声器
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-10-17 DOI: 10.1109/INTMAG.2005.1463750
K. Bang, Y. Yang, G. Hwang, S.M. Hwang
{"title":"Development of woofer microspeakers used cellular phones","authors":"K. Bang, Y. Yang, G. Hwang, S.M. Hwang","doi":"10.1109/INTMAG.2005.1463750","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1463750","url":null,"abstract":"In this paper, two important performance characteristics, SPL and 1/sup st/ resonant frequency, are analyzed for woofer microspeaker. For SPL and resonance analysis of microspeakers, magnetic force acting on the voice coil is determined by Lorentz law and electromagnetic FEM analysis. Harmonic analysis of diaphragm vibration and acoustical analysis are also followed using FEM to determine surface velocity of the diaphragm and sound pressure level. Noting that magnetic flux linkage is affected by vibrating voice coil, coupling between mechanical and magnetic analysis should be also considered. The simulated result of the proposed analysis is also compared with the experimental result for woofer microspeaker.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115290432","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
Fusion of electromagnetic inspection methods for evaluation of stress loaded steel samples 应力加载钢试样评定电磁检测方法的融合
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-10-17 DOI: 10.1109/INTMAG.2005.1464343
T. Chady, R. Sikora, G. Psuj, M. Enokizono, T. Todaka
{"title":"Fusion of electromagnetic inspection methods for evaluation of stress loaded steel samples","authors":"T. Chady, R. Sikora, G. Psuj, M. Enokizono, T. Todaka","doi":"10.1109/INTMAG.2005.1464343","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1464343","url":null,"abstract":"The magnetic leakage flux, multifrequency eddy current and Barkhausen noise methods were used to evaluate changes in materials properties induced by stress. Seven samples made of ferromagnetic low carbon steel with different stress level were prepared. The results showed tensile deformed samples at room temperature with a yield at around 350 MPa, residual strain between 0.7% and 14% and tensile stress from 100 MPa to 389 MPa.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121968095","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: 8
GMR and magnetodynamics of MnIr spin valves depending on growth order of FM and AFM layers 基于FM和AFM层生长顺序的MnIr自旋阀的GMR和磁动力学
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-10-17 DOI: 10.1109/INTMAG.2005.1464311
C. Lee, V. Gornakov, B. Koo, K. Shin
{"title":"GMR and magnetodynamics of MnIr spin valves depending on growth order of FM and AFM layers","authors":"C. Lee, V. Gornakov, B. Koo, K. Shin","doi":"10.1109/INTMAG.2005.1464311","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1464311","url":null,"abstract":"The influence of spin valve layers on its main properties was investigated. Giant magnetoresistance and domain structures of two types of spin valves, Si/5 nm Ta/3 nm Co/2.5 nm Cu/3 nm Co/ 10 nm Ir/sub 20/Mn/sub 80//5 nm Ta top spin valve (TSV) and Si/5 nm Ta/3 nm/10 nm Ir/sub 20/Mn/sub 80// Co/2.5 nm Cu/3 nm Co/5 nm Ta bottom spin valve (BSV), were studied experimentally. The samples were fabricated by dc magnetron sputter deposition on Si substrates. The magnetic properties (magnetic anisotropy, magnetization reversal, magnetic structure) and magnetoresistance of the spin valves were measured using vibrating sample magnetometer and four-point probe respectively.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129385361","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
Pole-tip protrusion effect on head-disk interface at low flying clearance 低飞行间隙时头盘界面的极尖突出效应
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-10-17 DOI: 10.1109/INTMAG.2005.1464138
Z. Gong, J.J. Liu
{"title":"Pole-tip protrusion effect on head-disk interface at low flying clearance","authors":"Z. Gong, J.J. Liu","doi":"10.1109/INTMAG.2005.1464138","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1464138","url":null,"abstract":"With the increase in the areal recording density on hard disk drives, head flying height is quickly dropping below 10 nm. The actual flying clearance of the head above the media surface during read-write operation is farther reduced by write-current induced pole-tip protrusion (PTP). At such a low flying height, the amount of PTP become a critical factor affecting head-disk interface tribology, especially in the areas of interface fly-ability and lubricant transfer from disk to head. This paper presents a new approach utilizing controlled PTP with acoustic emission sensing to study the head-disk interaction at close proximity flying. Actual flying clearance can be measured and controlled through this technique. The PTP contact hysteresis of surfaces with different is compared. With fixed flying clearance, the effects of PTP protrusion to disk lubricant redistribution and lubricant transfer from disk to head are reported.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127217902","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: 8
Structural and magnetic properties of Fe/sub 3-x/Cr/sub x/O/sub 4/ films grown on MgO(001) by molecular beam epitaxy 分子束外延法在MgO(001)上生长Fe/sub - 3-x/Cr/sub x/O/sub 4/薄膜的结构和磁性能
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-10-17 DOI: 10.1109/INTMAG.2005.1464188
C. Huang, D.S. Lee, G. Chern
{"title":"Structural and magnetic properties of Fe/sub 3-x/Cr/sub x/O/sub 4/ films grown on MgO(001) by molecular beam epitaxy","authors":"C. Huang, D.S. Lee, G. Chern","doi":"10.1109/INTMAG.2005.1464188","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1464188","url":null,"abstract":"A continuous change of Fe/Cr ratio was done and the structural and magnetic properties of a series of Fe/sub 3-x/Cr/sub x/O/sub 4/ films grown by molecular beam epitaxy were investigated in this paper. The valence of Cr ion usually forms 3+ state which is different from the most popular divalent ferrites such as Ni-, Co-ferrites. Replacing Fe by Cr in Fe/sub 3-x/Cr/sub x/O/sub 4/ films with lower Cr/Fe ratio (x < 1.5) causes a linear decrease of magnetization. But in the films with x > 1.5 the high valence state of Cr ion leads to instability of spinel structure and the ferrimagnetism no longer exists.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127246351","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
Characteristics of the Al/sub 2/O/sub 3/ barrier with CoFeB pinned layer in magnetic tunnel junctions 磁隧道结中CoFeB钉住层Al/sub 2/O/sub 3/势垒的特性
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-10-17 DOI: 10.1109/INTMAG.2005.1464450
J. Bae, W. C. Lim, Tae Wan Kim, T. Lee
{"title":"Characteristics of the Al/sub 2/O/sub 3/ barrier with CoFeB pinned layer in magnetic tunnel junctions","authors":"J. Bae, W. C. Lim, Tae Wan Kim, T. Lee","doi":"10.1109/INTMAG.2005.1464450","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1464450","url":null,"abstract":"Amorphous FM electrode, CoFeB, was used in MTJs to improve the property of the insulating layer interface. The tunnel junctions with a structure of Ta(50 nm)/NiFe(8 nm)/IrMn(10 nm)/pinned layer(4 nm)/Al/sub 2/O/sub 3/(Al 1.1 nm)/CoFeB(3 nm)/NiFe(15 nm) were prepared in a DC magnetron sputtering system. The junctions were made by a photolithographic method and the samples were annealed from 200 /spl deg/C to 340 /spl deg/C. The depth profiles of the insulating barrier before and after annealing were analyzed by XPS and SIMS. MR ratio and junction resistance (RA) products of the MTJs were measured with annealing temperature. The maximum MR ratio were observed at 260 /spl deg/C annealing. RA products increased up to 380 /spl deg/C for CoFeB pinned junctions while it increased up to a 280 /spl deg/C and decreased over this temperature in the tunnel junctions with CoFe pinned layer.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128966008","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
Switching characteristics in magnetic tunnel junctions with a synthetic antiferromagentic free layer 合成反铁磁自由层磁隧道结的开关特性
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-10-17 DOI: 10.1109/INTMAG.2005.1464451
Y. Lee, Y. K. Kim, Taewan Kim, W. Park, I. Hwang, W. Jeong, Jang-eun Lee
{"title":"Switching characteristics in magnetic tunnel junctions with a synthetic antiferromagentic free layer","authors":"Y. Lee, Y. K. Kim, Taewan Kim, W. Park, I. Hwang, W. Jeong, Jang-eun Lee","doi":"10.1109/INTMAG.2005.1464451","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1464451","url":null,"abstract":"The properties of sub-micrometer scaled MTJs using various synthetic antiferromagnetic (SAF) free layer were studied using remanent-state measurement. The magnetic tunnel junction device was a structure consisted of TiN/PtMn/CoFe/Ru/CoFe/AlO/NiFe/Ru/NiFe/Ta. It was found that junctions using single free layer showed complex switching behaviors with larger switching field variation while the junction using a specific SAF free layer exhibited kink-free R-H curves with less switching field variation. MR ratio and magnetization moment of the MTJ were also measured","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132555538","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
Thermal annealing of magneto-optical (Cd,Mn)Te waveguide for wider operation wavelength range of optical isolator 磁光(Cd,Mn)Te波导的热退火，用于更宽的光隔离器工作波长范围
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-10-17 DOI: 10.1109/INTMAG.2005.1464266
M. Debnath, V. Zayets, K. Ando
{"title":"Thermal annealing of magneto-optical (Cd,Mn)Te waveguide for wider operation wavelength range of optical isolator","authors":"M. Debnath, V. Zayets, K. Ando","doi":"10.1109/INTMAG.2005.1464266","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1464266","url":null,"abstract":"Several Cd/sub 1-x/Mn/sub x/Te (x = 0.225) core waveguides with graded-refractive-index (x = 0.225 - 0.26) layers are grown at 300/spl deg/C by molecular beam epitaxy (MBE) and annealed in the MBE chamber at different temperatures between 400/spl deg/C and 450/spl deg/C for 5 min. The post-growth annealing results in a wider wavelength range (between 710 nm and 735 nm) of the complete mode conversion ratio of the waveguides. The low optical propagation loss, high magneto-optical figure of merit and an isolation effect of annealed waveguides are also examined. The results of this experiment demonstrate the feasibility of (Cd,Mn)Te waveguide for the practical waveguide optical isolator.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129077853","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
Comparison of current distribution based on tissue in-homogeneity in magnetic stimulation for treatment of urinary incontinence 磁刺激治疗尿失禁中基于组织均匀性的电流分布比较
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-10-17 DOI: 10.1109/INTMAG.2005.1463990
M. Odagaki, K. Suga, T. Sasaki, H. Hosaka
{"title":"Comparison of current distribution based on tissue in-homogeneity in magnetic stimulation for treatment of urinary incontinence","authors":"M. Odagaki, K. Suga, T. Sasaki, H. Hosaka","doi":"10.1109/INTMAG.2005.1463990","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1463990","url":null,"abstract":"This study investigated current distribution in the female abdomen using experimental and computer models of magnetic stimulation for treatment of urinary incontinence. Four experimental models and two computer models were used to simulate current distributions. In the performed computations of eddy current distribution, 18 cross-sectional images (interslice gap, 10 mm; slice numbers 750-920) of a female pelvic region from the NPAC/OLDA Visible Human Viewer were used. The influence of tissue inhomogeneity on current distribution were investigated using experimental models. In the region of pelvic floor muscles at depths of 20 mm and 50 mm from the experimental model, analysis of eddy current distribution could not be performed as a homogeneous conductor due to large differences in angles and summation of currents between Models I and IV. Within the region of the bladder and other organs at a depth of 100 mm from the experimental model, the pelvis and other tissues exerted little influence on current distribution.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129479687","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
Thermo-resistive flight attitude measurements of flying heads in near field magneto-optical data storage 近场磁光数据存储中飞头的热阻飞行姿态测量
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-10-17 DOI: 10.1109/INTMAG.2005.1463550
H. Gatzen, S. Knappmann, C. Neumeister
{"title":"Thermo-resistive flight attitude measurements of flying heads in near field magneto-optical data storage","authors":"H. Gatzen, S. Knappmann, C. Neumeister","doi":"10.1109/INTMAG.2005.1463550","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1463550","url":null,"abstract":"A thermo-resistive test head that uses thermo-resistors embedded in the air bearing surface (ABS) was created. Joule heating by the sensing current generates a heat flow across the head-disk spacing which highly depends on the distance between ABS and disk. Due to the thermal sensors located on each of the four corners of a slider, pitch, roll, and flying height variations may be measured.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121019177","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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