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

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Reduction of grain size and ordering temperature in L1/sub 0/ FePt thin films L1/sub 0/ FePt薄膜晶粒尺寸的减小和有序温度
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-10-17 DOI: 10.1109/INTMAG.2005.1463587
A. Sun, P. Kuo, J. Hsu, H.L. Huang
{"title":"Reduction of grain size and ordering temperature in L1/sub 0/ FePt thin films","authors":"A. Sun, P. Kuo, J. Hsu, H.L. Huang","doi":"10.1109/INTMAG.2005.1463587","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1463587","url":null,"abstract":"In this research, a more effective procedure for reducing the ordering temperature of the L1/sub 0/ FePt thin films is proposed. These thin films, with thickness varying from 10 nm to 200 nm, are prepared by conventional magnetron sputtering system with a dc power supply and then postannealed in vacuum. The phases and microstructures of the films are characterized by X-ray diffraction (XRD) with Cu-K/spl alpha/ radiation and transmission electron microscopy (TEM) bright field image, respectively. TEM bright field images show that the films have average grain sizes of about 6 nm. XRD patterns show that there is no evidence that ordered structure exists in the film when annealing temperature (T/sub an/) /spl les/ 300/spl deg/C. For T/sub an/ /spl ges/ 350/spl deg/C, the disordered fcc FePt phase transforms into the ordered L1/sub 0/ FePt phase. Vacancies into the film are formed easily due to the high deposition rate process in this investigation. Some extra energy is introduced into the as-deposited film during deposition and reduced the order-disorder energy barrier.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"34 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":"134351969","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
Effect of film thickness of electrolessly deposited CoNiFeB soft magnetic underlayer on its magnetic properties 化学沉积CoNiFeB软磁衬底膜厚度对其磁性能的影响
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-10-17 DOI: 10.1109/INTMAG.2005.1464095
A. Sugiyama, K. Adachi, M. Sakagami, M. Yoshino, J. Kawaji, T. Asahi, T. Tsumori, T. Osaka
{"title":"Effect of film thickness of electrolessly deposited CoNiFeB soft magnetic underlayer on its magnetic properties","authors":"A. Sugiyama, K. Adachi, M. Sakagami, M. Yoshino, J. Kawaji, T. Asahi, T. Tsumori, T. Osaka","doi":"10.1109/INTMAG.2005.1464095","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1464095","url":null,"abstract":"Characteristic features of soft magnetic properties, namely, coercivity, shape of hysteresis loops and magnetic domain patterns in the CoNiFeB soft underlayer are drastically changed depending on its film thickness. Films were fabricated with an electroless deposition using DMAB (dimethylamineborane) as a reducing agent. Magnetic properties were measured with a vibrating sample magnetometer, and two-dimensional magnetic domain observations utilizing magneto-optical Kerr effect was performed with an optical surface analyzer.","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":"130934063","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
Nanometer scaled magnetic tunnel junctions fabricated by a substrate biased plasma etching technique 采用衬底偏置等离子体刻蚀技术制备纳米尺度磁性隧道结
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-10-17 DOI: 10.1109/INTMAG.2005.1464424
K. lee, J.Y. Chang, S.H. Han, K. Shin, W. Lee
{"title":"Nanometer scaled magnetic tunnel junctions fabricated by a substrate biased plasma etching technique","authors":"K. lee, J.Y. Chang, S.H. Han, K. Shin, W. Lee","doi":"10.1109/INTMAG.2005.1464424","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1464424","url":null,"abstract":"SiO/sub 2//Ta(50 /spl Aring/)/Ni/sub 81/Fe/sub 19/(60 /spl Aring/)/Fe/sub 50/Mn/sub 50/(80 /spl Aring/)/FM/sub BOTTOM/(40 /spl Aring/)/Al/sub 2/O/sub 3/(12-16 /spl Aring/)/FM/sub TOP/(100 /spl Aring/)/Ta(20 /spl Aring/) are prepared on a thermally oxidized Si(100) substrate. FM layer used is Ni/sub 81/Fe/sub 19/ or Co/sub 84/Fe/sub 16/. The effect of substrate-biased plasma etching process on magnetotransport properties in magnetic tunnel junctions compared to that of the device prepared by a conventional way is investigated. Several properties such as TMR ratio and junction resistance, magnetization switching behavior of the MTJs are also investigated.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"81 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":"132276716","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
Magnetization switching and tunneling magnetoresistance effects with synthetic antiferromagnet free layers consisting of amorphous CoFeSiB 非晶CoFeSiB合成反铁磁层的磁化开关和隧穿磁阻效应
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-08-18 DOI: 10.1063/1.2033128
J. Hwang, Soon Sub Kim, J. Rhee, B. Chun, Il Sang You, Oh. Byung Seok, Y. K. Kim, Taewan Kim, W. Park
{"title":"Magnetization switching and tunneling magnetoresistance effects with synthetic antiferromagnet free layers consisting of amorphous CoFeSiB","authors":"J. Hwang, Soon Sub Kim, J. Rhee, B. Chun, Il Sang You, Oh. Byung Seok, Y. K. Kim, Taewan Kim, W. Park","doi":"10.1063/1.2033128","DOIUrl":"https://doi.org/10.1063/1.2033128","url":null,"abstract":"MTJs with the synthetic antiferromagnetic (SAF) free layer consisting of CoFeSiB/Ru/CoFeSiB were prepared because a SAF structure can reduce the magnetostatic coupling. Magnetic switching and tunneling magnetoresistance (TMR) ratio of MTJs were investigated by experiment and by simulation. SAF structures show lower TMR ratio and coercivity (H/sub c/) than single free layer due to low net magnetic moment. The CoFeSiB SAF structure was found to have lower exchange energy.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134432546","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: 15
Pt thickness dependence of oscillatory interlayer exchange coupling in [CoFe/Pt/CoFe]/IrMn multilayers with perpendicular anisotropy 垂直各向异性[CoFe/Pt/CoFe]/IrMn多层膜中振荡层间交换耦合对Pt厚度的依赖性
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-06-01 DOI: 10.4283/JMAG.2005.10.2.044
J. Choi, J. Lee, M. Kim, D. Hwang, S.S. Lee, J. Rhee
{"title":"Pt thickness dependence of oscillatory interlayer exchange coupling in [CoFe/Pt/CoFe]/IrMn multilayers with perpendicular anisotropy","authors":"J. Choi, J. Lee, M. Kim, D. Hwang, S.S. Lee, J. Rhee","doi":"10.4283/JMAG.2005.10.2.044","DOIUrl":"https://doi.org/10.4283/JMAG.2005.10.2.044","url":null,"abstract":"The interlayer exchange coupling (IEC) in glass/[Buffer:NiO/Pt]/Co/sub 90/Fe/sub 10//Pt/Co/sub 90/Fe/sub 10//Ir/sub 22/Mn/sub 78/ multilayers within an out-of-plane easy axis is studied. The observed oscillatory behavior of the IEC as a function of the nonmagnetic metallic layer (Pt) is thought to be related to the antiferromagnetic ordering induced by the antiferromagnetic IrMn layer.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115984662","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
Reluctance network method based dynamic model of radial active magnetic bearings 基于磁阻网络方法的径向主动磁轴承动力学模型
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-04-04 DOI: 10.1109/INTMAG.2005.1464144
R. Pollanen, J. Nerg, O. Pyrhonen
{"title":"Reluctance network method based dynamic model of radial active magnetic bearings","authors":"R. Pollanen, J. Nerg, O. Pyrhonen","doi":"10.1109/INTMAG.2005.1464144","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1464144","url":null,"abstract":"Active magnetic bearings (AMB) are increasingly used in high-speed electrical machines, compressors, turbomachinery, spindles and energy storage flywheels. In order to investigate the performance of these bearings, and especially to develop a reliable control for them, an accurate and computationally efficient bearing model is required. In the model the magnetic nonlinearities due to saturation of the magnetic materials as well as the impact of the leakage flux paths, cross-coupling effects and the eccentric rotor must be considered. Mainly, the analysis and design of AMB are based on two-dimensional (2-D) finite-element method (FEM). Although this method yields a precise determination of the device performance, it is not attractive for dynamic simulations due to its high computational cost. Alternatively, the reluctance network method (RNM) provides satisfactory accuracy compared to the 2-D FEM but with only a fraction of computations. In this paper, a dynamic model for a radial active magnetic bearing is developed using the RNM.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115282677","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: 7
Development of a magnetic seat sensor for monitoring condition of a car driver 用于监测汽车驾驶员状态的磁性座椅传感器的研制
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-04-04 DOI: 10.1109/INTMAG.2005.1463648
Y. Tsuchida, H. Shimoji, T. Todaka, M. Enokizono, H. Yamane, Y. Enoki, E. Fujita
{"title":"Development of a magnetic seat sensor for monitoring condition of a car driver","authors":"Y. Tsuchida, H. Shimoji, T. Todaka, M. Enokizono, H. Yamane, Y. Enoki, E. Fujita","doi":"10.1109/INTMAG.2005.1463648","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1463648","url":null,"abstract":"The purpose of our research is to develop the prevention system of a car driver's dozing off at the wheel by a magnetic sensor, which is built in driver's seats of cars and trucks. Torsion bars are ones of the parts of the car driver's seat. Torsion stress occurs in these bars when a car driver sits on the seat, and these bars works as a cushion to the driver. In this research, we tried to measure difference of magnetic properties of those torsion bars because of the torsion stress by a magnetic sensor to apply it to monitor car driver's condition.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115320302","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
Justification of an alternative system for one- and two-dimensional magnetic measurements 对一、二维磁测量替代系统的论证
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-04-04 DOI: 10.1109/INTMAG.2005.1463783
J. Krah, G. Engdahl
{"title":"Justification of an alternative system for one- and two-dimensional magnetic measurements","authors":"J. Krah, G. Engdahl","doi":"10.1109/INTMAG.2005.1463783","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1463783","url":null,"abstract":"A novel two-dimensional measurement set-up for magnetic sheet characterization has been designed and constructed. Experimental verification shows that the inhomogeneity of the magnetic flux through the sample was smaller than the measurement error, whereas the required electric excitation decreased considerably. The aim of this paper is to prove that the new measurement system is superior to the Epstein frame and the rotational single sheet tester (RSST) and can be recommended.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115371421","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
Kondo resonance in magnetic double tunnel junctions 磁双隧道结中的近藤共振
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-04-04 DOI: 10.1109/INTMAG.2005.1463669
H. Yang, S. Yang, C. Kaiser, S. Parkin
{"title":"Kondo resonance in magnetic double tunnel junctions","authors":"H. Yang, S. Yang, C. Kaiser, S. Parkin","doi":"10.1109/INTMAG.2005.1463669","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1463669","url":null,"abstract":"The magneto-transport properties of double tunnel junctions are reported as a function of temperature and bias. The double tunnel junctions were formed with MgO tunnel barriers and CoFe magnetic electrodes in which the middle electrode is comprised of ultra-thin CoFe layers. Double magnetic tunnel junctions, comprised of CoFe/MgO/CoFe/MgO/CoFe, were deposited on SiO/sub 2/ through a sequence of metal shadow masks using dc magnetron sputtering at room temperature. Tunneling magnetoresistance and AC conductance measurements show a peak in the conductance at low bias voltages and temperatures (below /spl sim/50 K) and a strong suppression of tunneling magnetoresistance in the same bias voltage and temperature regime. These features are strongly reminiscent of Kondo resonance effects previously observed previously in lithographically defined quantum dots and C/sub 60/ molecules placed between ferromagnetic electrodes.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123044523","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
Effect of NiCr and NiFeCr seedlayer on magnetic properties and crystallography of CoCrPt-SiO/sub 2/ perpendicular recording media NiCr和NiFeCr种子层对CoCrPt-SiO/sub - 2/垂直记录介质磁性和晶体学的影响
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. Pub Date : 2005-04-04 DOI: 10.1109/INTMAG.2005.1463720
M. Shibamoto, K. Yamanaka, D. Djayaprawira, N. Watanabe
{"title":"Effect of NiCr and NiFeCr seedlayer on magnetic properties and crystallography of CoCrPt-SiO/sub 2/ perpendicular recording media","authors":"M. Shibamoto, K. Yamanaka, D. Djayaprawira, N. Watanabe","doi":"10.1109/INTMAG.2005.1463720","DOIUrl":"https://doi.org/10.1109/INTMAG.2005.1463720","url":null,"abstract":"There have been intensive research activities on perpendicular magnetic recording media using CoCrPt-SiO/sub 2/ material as the recording layer. To obtain a relatively high coercivity and good crystallography relatively thick Ru thickness is necessary. In this paper, we studied the effect if NiCr and NiFeCr seedlayer on the magnetic properties and crystallography of CoCrPt-SiO/sub 2/ PMR media using vibrating sample magnetometer and X-ray diffractometry (XRD). The PMR media were deposited by sputtering on a glass substrate.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"187 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123051299","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
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