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INTERMAG 2006 - IEEE International Magnetics Conference最新文献

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An Experimental Study of the Effect of Frequency and Write Current Overshoot on Over-write in Perpendicular Recording 垂直记录中频率和写入电流超调对覆盖影响的实验研究
INTERMAG 2006 - IEEE International Magnetics Conference Pub Date : 2006-05-08 DOI: 10.1109/INTMAG.2006.376069
W. Zhu, P. Lu, S. Li, Z. Jin, D. Palmer
{"title":"An Experimental Study of the Effect of Frequency and Write Current Overshoot on Over-write in Perpendicular Recording","authors":"W. Zhu, P. Lu, S. Li, Z. Jin, D. Palmer","doi":"10.1109/INTMAG.2006.376069","DOIUrl":"https://doi.org/10.1109/INTMAG.2006.376069","url":null,"abstract":"It is well known that higher coercivity media is required to achieve higher density in magnetic recording. Such high coercivity may cause a write-ability problem when the writer cannot generate sufficient field to saturate the media. Overwrite is a standard test method to measure the write-ability. In this work, we have investigated the frequency and write current overshoot influences on overwrite processes with a high coercivity medium in perpendicular recording.","PeriodicalId":262607,"journal":{"name":"INTERMAG 2006 - IEEE International Magnetics Conference","volume":"280 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115218931","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
Structural and magnetic properties of Tb0.27Dy0.73Fe2-xNbx (x = 0, 0.05, 0.1 and 0.2) Tb0.27Dy0.73Fe2-xNbx (x = 0、0.05、0.1和0.2)的结构和磁性能
INTERMAG 2006 - IEEE International Magnetics Conference Pub Date : 2006-05-08 DOI: 10.1109/INTMAG.2006.376175
Hari Babu, A. Subrahmanyam, M. Palit, S. Pandian
{"title":"Structural and magnetic properties of Tb0.27Dy0.73Fe2-xNbx (x = 0, 0.05, 0.1 and 0.2)","authors":"Hari Babu, A. Subrahmanyam, M. Palit, S. Pandian","doi":"10.1109/INTMAG.2006.376175","DOIUrl":"https://doi.org/10.1109/INTMAG.2006.376175","url":null,"abstract":"In this paper, the effect of substituting Fe partially by the 4d element Nb on the structural and magnetic properties of Tb<sub>0.27</sub>Dy<sub>0.73</sub>Fe<sub>2</sub> is reported. Polycrystalline compounds of Tb<sub>0.27</sub>Dy<sub>0.73</sub>Fe<sub>2-x</sub>Nb<sub>x</sub> (x = 0, 0.05, 0.1 and 0.2) were prepared by arc melting the constituent elements (rare earths-99.9 % pure, Fe and Nb -99.95 % pure) in an arc furnace under argon atmosphere. The ingots were annealed in vacuum at 950degC for a week. X-ray diffraction patterns of these compounds were taken using a PANalytical X-ray diffractrometer. Magnetization up to 12 kOe and Curie temperature (T<sub>c</sub>) measurements were carried out using a PAR-155 vibrating sample magnetometer (VSM). Magnetostriction measurements at room temperature were carried out employing strain gauge method.","PeriodicalId":262607,"journal":{"name":"INTERMAG 2006 - IEEE International Magnetics Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115248047","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
New NdFeB-based bulk "exchange spring"-type permanent magnets. Experimental and micromagnetic FORC analysis 新型钕铁硼基块状“交换弹簧”型永磁体。实验和微磁FORC分析
INTERMAG 2006 - IEEE International Magnetics Conference Pub Date : 2006-05-08 DOI: 10.1109/INTMAG.2006.375803
H. Chiriac, N. Lupu, L. Stoleriu, P. Postolache, A. Stancu
{"title":"New NdFeB-based bulk \"exchange spring\"-type permanent magnets. Experimental and micromagnetic FORC analysis","authors":"H. Chiriac, N. Lupu, L. Stoleriu, P. Postolache, A. Stancu","doi":"10.1109/INTMAG.2006.375803","DOIUrl":"https://doi.org/10.1109/INTMAG.2006.375803","url":null,"abstract":"Summary form only given. This paper focuses on the possibility of direct casting miniature NdFeB-based bulk permanent magnets in different three-dimensional shapes for various applications, with amorphous structure followed by subsequent optimal annealing. Nd<sub>3</sub>Dy<sub>1</sub>Fe<sub>66</sub>Co<sub>10</sub>B<sub>20</sub> bulk nanocomposite permanent magnets in form of rods with diameters ranging from 0.5 to 0.8 mm have been prepared by devitrification annealing of amorphous and partly-amorphous precursors produced by injection die-casting. A fully amorphous structure was obtained for rods with the diameter as large as 0.6 mm. The best-achieved magnetic properties have been obtained for the optimum devitrification (15 min at 630degC) samples with 0.6 mm diameter, and are: H<sub>C,5T</sub> = 316 kA/m, mu<sub>0</sub>M<sub>r,6T</sub>= 1.04 T, M<sub>r</sub>/M<sub>max,6T</sub>=0.68 and (BH)<sub>max,6T</sub>=98 kJ/m<sup>3</sup>. The samples were characterized using the first-order reversal curve diagram (FORC). The micromagnetic simulation reproduced the experimental results.","PeriodicalId":262607,"journal":{"name":"INTERMAG 2006 - IEEE International Magnetics Conference","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115527875","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 a cantilevered actuator driven by magnetostriction in low magnetic field 低磁场下磁致伸缩悬臂式驱动器的研究
INTERMAG 2006 - IEEE International Magnetics Conference Pub Date : 2006-05-08 DOI: 10.1109/INTMAG.2006.376402
C. Yokota, A. Yamazaki, M. Sendoh, S. Agatsuma, K. Ishiyama, K. Arai
{"title":"Study of a cantilevered actuator driven by magnetostriction in low magnetic field","authors":"C. Yokota, A. Yamazaki, M. Sendoh, S. Agatsuma, K. Ishiyama, K. Arai","doi":"10.1109/INTMAG.2006.376402","DOIUrl":"https://doi.org/10.1109/INTMAG.2006.376402","url":null,"abstract":"A cantilevered actuator is fabricated in this study by sputter deposition using amorphous Fe72Si14B14 as the magnetostrictive material. The displacement of the cantilever is observed with applying the magnetic field of 10 kA/m to the width direction of the cantilever. Results show that the displacement of the cantilever increased with decreasing substrate thickness, and has a peak value at the thickness of the magnetic thin film of 0.5 mum when the substrate thickness is 7.5 mum.","PeriodicalId":262607,"journal":{"name":"INTERMAG 2006 - IEEE International Magnetics Conference","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116543244","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
Influence of interfacial exchange coupling on microwave permeability in exchange coupled CoFe/MnIr bilayers 界面交换耦合对交换耦合CoFe/MnIr双层微波磁导率的影响
INTERMAG 2006 - IEEE International Magnetics Conference Pub Date : 2006-05-08 DOI: 10.1109/INTMAG.2006.374985
D. Kim, C. Kim, M. Tsunoda, M. Yamaguchi, M. Takahashi
{"title":"Influence of interfacial exchange coupling on microwave permeability in exchange coupled CoFe/MnIr bilayers","authors":"D. Kim, C. Kim, M. Tsunoda, M. Yamaguchi, M. Takahashi","doi":"10.1109/INTMAG.2006.374985","DOIUrl":"https://doi.org/10.1109/INTMAG.2006.374985","url":null,"abstract":"The Co70Fe30(t=100 nm)/MnIr(tAF nm) bilayers with tAF=0, 2,4, 10 and 20 were deposited onto a 20 nm Cu buffer layer grown on oxide silicon wafer at room temperature by dc magnetron sputtering method. A magnetic field of 30 Oe was applied during the deposition of bilayers. The CoFe/MnIr bilayers were annealed at 200degC and 340degC for 1 h in a magnetic field of 1 kOe in vacuum along the direction of the applied field during the deposition. The high frequency transverse permeability was measured in the frequency range of 100 MHz to 9 GHz. The Heb and coercive field (Hc) with field angle was measured with a Magneto-Optic Kerr Effect (MOKE) instrument. The uniaxial and unidirectional anisotropy constant was measured by torque magnetometers in order to obtain the uniaxial and unidirectional anisotropy constant of CoFe layer. The interfacial exchange coupling field has been estimated from the curve fitting of Heb and coercive field (Hc) with field angle by using the Stoner-Wohlfarth model.","PeriodicalId":262607,"journal":{"name":"INTERMAG 2006 - IEEE International Magnetics Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122785786","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 magnetic field on the magnetic domain structure of MnAs film on GaAs(001) 磁场对GaAs表面MnAs膜磁畴结构的影响(001)
INTERMAG 2006 - IEEE International Magnetics Conference Pub Date : 2006-05-08 DOI: 10.1109/INTMAG.2006.375679
J. Kim, H. Lee, Y. Lee, K. Ryu, S. Shin, H. Akinaga
{"title":"Effect of magnetic field on the magnetic domain structure of MnAs film on GaAs(001)","authors":"J. Kim, H. Lee, Y. Lee, K. Ryu, S. Shin, H. Akinaga","doi":"10.1109/INTMAG.2006.375679","DOIUrl":"https://doi.org/10.1109/INTMAG.2006.375679","url":null,"abstract":"In this work, the effects of external magnetic field were studied, on the magnetic domain structure and the magnetic properties of epitaxial MnAs films on GaAs.","PeriodicalId":262607,"journal":{"name":"INTERMAG 2006 - IEEE International Magnetics Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122487560","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: 4
Magnetization Relaxation in Sputtered Thin Fe Films; A FMR study 溅射Fe薄膜的磁化弛豫FMR研究
INTERMAG 2006 - IEEE International Magnetics Conference Pub Date : 2006-05-08 DOI: 10.1109/INTMAG.2006.375597
B. Kuanr, A. V. Kuanr, R. Camley, Z. Celinski
{"title":"Magnetization Relaxation in Sputtered Thin Fe Films; A FMR study","authors":"B. Kuanr, A. V. Kuanr, R. Camley, Z. Celinski","doi":"10.1109/INTMAG.2006.375597","DOIUrl":"https://doi.org/10.1109/INTMAG.2006.375597","url":null,"abstract":"In this paper, the authors studied the ferromagnetic resonance (FMR) linewidth of thin Fe films in NM/Fe/NM structures (NM[30 Aring]=Al, Cu, Ti and Ta) to investigate the relaxation mechanism. Polycrystalline Fe films, with thicknesses of 20 to 300 Aring in steps of 20 Aring were grown by sputtering on GaAs(100) substrates. The experimental results and their interpretation agreed with the microscopic theories taking into account spin-current generated by the precession of magnetization in NM/Fe/NM films.","PeriodicalId":262607,"journal":{"name":"INTERMAG 2006 - IEEE International Magnetics Conference","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123004726","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
Experimental estimation of the magnetic energy distribution of CoCrTa from EFTEM data EFTEM数据对CoCrTa磁能分布的实验估计
INTERMAG 2006 - IEEE International Magnetics Conference Pub Date : 2006-05-08 DOI: 10.1109/INTMAG.2006.376427
J. Al-sharab, J. Wittig, J. Bentley, N. Evans, G. Bertero, T. Yamashita
{"title":"Experimental estimation of the magnetic energy distribution of CoCrTa from EFTEM data","authors":"J. Al-sharab, J. Wittig, J. Bentley, N. Evans, G. Bertero, T. Yamashita","doi":"10.1109/INTMAG.2006.376427","DOIUrl":"https://doi.org/10.1109/INTMAG.2006.376427","url":null,"abstract":"Energy-filtered transmission electron microscopy (EFTEM) was used to estimate the magnetic energy distribution of magnetic CoCrTa thin films. The films were obtained by sputtering onto identical substrates with a CrMo seed-layer. The results show that the coercivity was increased with increasing substrate temperature.","PeriodicalId":262607,"journal":{"name":"INTERMAG 2006 - IEEE International Magnetics Conference","volume":"160 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114608300","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
Preparation and Fundamental Properties of Magneto-Optic Analog Spatial Light Modulator with One Dimensional MagnetoPhotonic Crystals 一维磁光子晶体磁光模拟空间光调制器的制备及其基本性质
INTERMAG 2006 - IEEE International Magnetics Conference Pub Date : 2006-05-08 DOI: 10.1109/INTMAG.2006.375823
H. Takagi, K. Takahashi, A. Tsuzuki, P. Lim, H. Uchida, M. Inoue
{"title":"Preparation and Fundamental Properties of Magneto-Optic Analog Spatial Light Modulator with One Dimensional MagnetoPhotonic Crystals","authors":"H. Takagi, K. Takahashi, A. Tsuzuki, P. Lim, H. Uchida, M. Inoue","doi":"10.1109/INTMAG.2006.375823","DOIUrl":"https://doi.org/10.1109/INTMAG.2006.375823","url":null,"abstract":"This paper, for the first time, presents the preparation and fundamental properties of analog magneto-optic spatial light modulators (MOSLM) which is composed of one-dimensional (1D) magnetophotonic crystals (MPCs). The use of 1D-MPCs in MOSLM is very useful because large Faraday rotation angle of the medium can be obtained at a particular wavelength of light by designing the medium structure, which results in considerable improvement of optical contrast in MOSLM. Large enhancement in Faraday rotation (approximately 5 times large) was obtained for the localized mode of light, suggesting that the optical contrast of MOSLM can be enhanced considerably, although the garnet film thickness was very thin.","PeriodicalId":262607,"journal":{"name":"INTERMAG 2006 - IEEE International Magnetics Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122083118","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
Pre-oxidation Suppresses Orange-peel Coupling in Magnetic Tunnel Junctions 预氧化抑制磁隧道结的橘皮耦合
INTERMAG 2006 - IEEE International Magnetics Conference Pub Date : 2006-05-08 DOI: 10.1109/INTMAG.2006.376454
W. Egelhoff, R. McMichael, C. Dennis, M.D. Siles, A. Shapiro, B. Maranville, C. Powell
{"title":"Pre-oxidation Suppresses Orange-peel Coupling in Magnetic Tunnel Junctions","authors":"W. Egelhoff, R. McMichael, C. Dennis, M.D. Siles, A. Shapiro, B. Maranville, C. Powell","doi":"10.1109/INTMAG.2006.376454","DOIUrl":"https://doi.org/10.1109/INTMAG.2006.376454","url":null,"abstract":"Orange-peel coupling (OPC) is a common problem when magnetic tunnel junctions (MTJs) are used to detect low magnetic fields. OPC acts as an anisotropy field to reduce the sensitivity of the free layer to small magnetic fields. We have have found that pre-oxidation of the bottom Co electrode in MJTs very effectively suppresses OPC.","PeriodicalId":262607,"journal":{"name":"INTERMAG 2006 - IEEE International Magnetics Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129606407","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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