Dynamo magnetic domain analysis by nano-scale resolution MFM for high-density magnetic recording media
Dynamo magnetic domain analysis by nano-scale resolution MFM for high-density magnetic recording media
批准号:
14550287
负责人:
SAITO Hitoshi
金额:
$2.18万
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research (C)
财政年份:
2002
资助国家:
日本
项目状态:
已结题
起止时间:
2002 至 2003
中文摘要
为了发展超过1T比特/英寸的超高密度磁记录介质,降低介质磁化强度的时空起伏引起的介质噪声是一个重要的问题。因此,需要对磁畴结构进行高空间分辨率的动态分析。本研究利用强磁场下的原位磁力显微镜(MFM)进行了以下研究:(1)研制了横向分辨率小于5 nm的MFM系统;(2)发展了利用MFM对磁畴结构进行动态分析的方法;(3)将其应用于高密度磁记录介质中,获得了以下结果:1)利用L1_0有序FePT合金制备了分辨率为10 nm的高矫顽力MFM尖端(Hc≫10kOe)。通过对不同形状的针尖传递函数的计算,阐明了分辨率小于5 nm的高分辨率针尖的设计。椭圆度为~tan70°的球形圆柱形尖端是高分辨率MFM尖端较好的候选材料。2)发展了强磁场下的原位动态MFM测量,并将其应用于各种高密度磁记录介质,如合成蕨类磁性介质、图案化介质。揭示了纳米碳氢化合物在介质中的分布。
英文摘要
To develop ultra-high density magnetic recording media more than 1Tbit/inch^2 the reduction of media noise, which was occurred by the spatial and temporal fluctuation of media magnetization is important problem. Therefore the dynamic analysis of magnetic domain structure with high spatial resolution will be needed. In the present study, the research was carried out by using in-situ magnetic force microscope (MFM) in strong magnetic fields for the following purpose.(1)the development of MFM system with lateral resolution less than 5 nm(2)the development of dynamic analysis of magnetic domain structure using MFM(3)application of to high density magnetic recording mediaThe following results are obtained.1)High coercivity MFM tips with 10nm resolution (Hc>10kOe) were fabricated by using L1_0 ordered FePt alloy. The design of high-resolution tips with less than 5nm resolution were clarified by calculating the transfer function of the tips with various shape. Cylindrical tips with an spheroidal tip-end having an ellipticity of〜tan70°was found to be better candidates of high resolution MFM tips. The fabrication of these tips is in progress.2)In-situ dynamic MFM measurements in strong magnetic field were developed and applied to various high-density magnetic recording media, such as synthetic fern-magnetic media, patterned media. The nano-scale Hc distribution in the media was revealed.
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H.Ito, T.Kusunoki, H.Saito, S.Ishio: "The study on the ordering mechanism in FePt thin films with rapidthermal annealing process"J.Magn.Magn.Mater.. (in Press). (2004)
H.Ito、T.Kusunoki、H.Saito、S.Ishio:“快速热退火过程中 FePt 薄膜有序机制的研究”J.Magn.Magn.Mater..(出版中)。
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通讯作者:
H.Saito, S.Ishio, A.Bos, L.Abelmann, C.Lodder: "Simulation Study of High Resolution MFM Tips"Tech.Report of IEICE Japan. MR2003-5. 21-25 (2003)
H.Saito、S.Ishio、A.Bos、L.Abelmann、C.Lodder:“高分辨率 MFM 针尖的模拟研究”日本 IEICE 技术报告。
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H.Saito, K.Miyazaki, S.Ishio: "In Situ Magnetic Hysteresis Measurement of Magnetic Tips in Magnetic Force Microscope"J.Magn Magn.Mater.. 240. 73-75 (2002)
H.Saito、K.Miyazaki、S.Ishio:“磁力显微镜中磁尖的原位磁滞测量”J.Magn Magn.Mater.. 240. 73-75 (2002)
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S.Ishio, G.Q.Li, H.Takahoshi, H.Ito, H.Saito, T.Shima, K.Takanashi: "Domain structure movement in L1_0 FePt islands observed by in situ MFM"J.Magn.Magn.Mater.. (In press). (2004)
S.Ishio、G.Q.Li、H.Takahoshi、H.Ito、H.Saito、T.Shima、K.Takanashi:“原位 MFM 观察到的 L1_0 FePt 岛屿中的磁畴结构运动”J.Magn.Magn.Mater..
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S.Ishio, T.Yoshino, H.Saito, T.Suzuki, K.Ohuchi: "Giant magnetoresistive effect in L1_0 ordered FePt films"J.Magn Magn.Mater.. 239. 217-219 (2002)
S.Ishio、T.Yoshino、H.Saito、T.Suzuki、K.Ohuchi:“L1_0 有序 FePt 薄膜中的巨磁阻效应”J.Magn Magn.Mater.. 239. 217-219 (2002)
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共 16 条
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Basic study on chemotherapy combined with gene transfection for head and neck cancer
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Amelioration of aminoglycosideototoxicity by polyanion given through specific routes
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