Magnetic Fine Structure and High Resolution MFM Observation of Ultra High Density Magnetic Recording Media Aiming at Tera-bit/inch^2

针对Tera-bit/inch^2的超高密度磁记录介质的磁性精细结构和高分辨率MFM观测

基本信息

  • 批准号:
    17310065
  • 负责人:
  • 金额:
    $ 9.02万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2005
  • 资助国家:
    日本
  • 起止时间:
    2005 至 2006
  • 项目状态:
    已结题

项目摘要

1. Magnetic fine structure and recording medium noise of high density magnetic recording media(1.1) Correlation analysis between medium noise and magnetic properties analyzed by the medium noise-coercivity overlapping methodMedium noise-coercivity overlapping method was developed by using magnetic force microscopy and was used to study the origin of medium noise of 400〜600 Gbit/inch^2 class perpendicular media. It was made clear that medium noise arises from (1) a spatial fluctuation of magnetization reversal filed in the media, where fluctuation length extends to about 100nm, (2) an insufficient magnetic filed gradient of recording head.(1.2) Fabrication of FePt nano-dot patterned media and nano-hole mediaIt was found that coercivity of L1_0FePt reduces by ion irradiation of Nb^+, Ga^+ and Cr^+ ions from 10kOe to almost 0. Then magnetic nano-dot with about 100 square was successfully fabricated by Ga^+ FIB. Co nano-hole medium was also fabricated by anodic oxidation of alumina. Magnet … More ization reversal filed analysis was done for both media. Both media have high potential for ultra high density recording media over 1 terabit/inch^2.2. Development of magnetic imaging method with atomic 〜 nano spatial resolution(2.1) Development of magnetic tip with high spatial resolution MFMMagnetic thin films with high saturation magnetization and high coercivity must be sputtered on to MFM tips to achieve high resolution less than 10 nm. The fabrication process to obtain such high resolution tip for MFM was studied. Firstly, surface of Si tip was oxidized by plasma oxidation, and then FePt was sputtered on the oxidized tip. Finally, by annealing around 900K, high resolution tip was obtained for magnetic force microscope. Spatial resolution was determined by Fourier analysis and was revealed to be 11-15 nm.(2.2) Introduction of frequency detection methodFrequency detection method was introduced to improve a resolution to MFM system. Frequency detection system did not work well so far due to instability. Less
1.高密度磁记录介质的磁精细结构和记录介质噪声(1.1)介质噪声与磁特性的相关性分析介质噪声-磁势叠加法利用磁力显微镜发展了介质噪声-磁势叠加法,并用于研究400 ~ 600 Gbit/in^2类垂直介质的介质噪声来源。明确了介质噪声的产生原因是(1)介质中磁化反转场的空间波动,其中波动长度延伸到约100 nm,(2)记录头的磁场梯度不足。(1.2)FePt纳米点图案化介质和纳米孔介质的制备研究发现,经过Nb^+、Ga^+和Cr^+离子辐照后,L1_0 FePt的介电常数从10 kOe降低到0.然后用Ga^+ FIB成功制备了约100个正方形的磁性纳米点。采用阳极氧化法制备了Co纳米孔介质。磁体 ...更多信息 对这两种介质进行极化反转场分析。这两种介质都有很大的潜力成为超过1太比特/英寸的超高密度记录介质^[2.2]。具有原子级纳米空间分辨率的磁成像方法的开发(2.1)具有高空间分辨率的磁性针尖的开发具有高饱和磁化强度和高矫顽力的磁性薄膜必须溅射到MFM针尖上以实现小于10 nm的高分辨率。研究了获得这种高分辨力微力显微镜针尖的工艺过程。首先,通过等离子体氧化来氧化Si尖端的表面,然后在氧化的尖端上溅射FePt。最后,通过900 K左右的退火,获得了用于磁力显微镜的高分辨率针尖。通过傅立叶分析确定空间分辨率,并显示为11-15 nm。(2.2)频率检测方法介绍为了提高MFM系统的分辨率,引入了频率检测方法.频率检测系统由于不稳定,到目前为止工作得不好。少

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Reduction of noise and fabrication of high-resolution tips for a high-resolution magnetic force microscope.
降低噪音并制造高分辨率磁力显微镜的高分辨率尖端。
  • DOI:
  • 发表时间:
    2005
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Hitoshi Saito;Takashi Natsume;Ryosuke Sunahara;Y.W.Rheem;Shunji Ishio
  • 通讯作者:
    Shunji Ishio
ナノマテリアル工学大系 第2巻 ナノ金属
纳米材料工程系列第 2 卷纳米金属
  • DOI:
  • 发表时间:
    2006
  • 期刊:
  • 影响因子:
    0
  • 作者:
    安保正一;松岡雅也;竹内雅人
  • 通讯作者:
    竹内雅人
Structural transition from L10 phase to A1 phase in FePt films caused by ion irradiation
  • DOI:
    10.1063/1.2177382
  • 发表时间:
    2006-03
  • 期刊:
  • 影响因子:
    3.2
  • 作者:
    T. Hasegawa;G. Li;W. Pei;H. Saito;S. Ishio;K. Taguchi;K. Yamakawa;N. Honda;K. Ouchi;T. Aoyama;I. Sato
  • 通讯作者:
    T. Hasegawa;G. Li;W. Pei;H. Saito;S. Ishio;K. Taguchi;K. Yamakawa;N. Honda;K. Ouchi;T. Aoyama;I. Sato
Fabrication of FePt/FeCo/FePt exchange spring trilayer with very thin FeCo layer for high resolution MFM tips
具有非常薄的 FeCo 层的 FePt/FeCo/FePt 交换弹簧三层的制造,用于高分辨率 MFM 尖端
Nanomaterial Engineering Compendium, Vol.2, Nano-metal
纳米材料工程纲要,第 2 卷,纳米金属
  • DOI:
  • 发表时间:
    2005
  • 期刊:
  • 影响因子:
    0
  • 作者:
    T. Hosoya;et. al.;Shunji Ishio
  • 通讯作者:
    Shunji Ishio
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ISHIO Shunji其他文献

ISHIO Shunji的其他文献

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{{ truncateString('ISHIO Shunji', 18)}}的其他基金

Self-exciting magnetic force microscopy with 1-10 nm resolution and spin structure observation
具有1-10 nm分辨率和自旋结构观察的自激磁力显微镜
  • 批准号:
    21310069
  • 财政年份:
    2009
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
RESEARCH ON NEW GIANT MAGNETOSTRICTIVE RARE EARTH-TRANSITION METAL INTERMETALLIC COMPOUNDS, AND CONTROL OF HIGH MAGNETOMECHANICAL COUPLING
新型巨磁致伸缩稀土过渡金属金属间化合物及高磁力耦合控制研究
  • 批准号:
    03650523
  • 财政年份:
    1991
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
Fabrication of Metastable Solid Solution in Rare Earth-Transition Metal Alloys, and Their Magentic Properties
稀土过渡金属合金亚稳态固溶体的制备及其磁性能
  • 批准号:
    01550501
  • 财政年份:
    1989
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

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基于高熵合金的磁记录介质
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Theoretical study of laser-excited magnetization reversal dynamics for developing ultra-high-density magnetic recording media
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    1933527
  • 财政年份:
    2018
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开发包含离子辐照诱导的3nm反铁磁结构的高密度磁记录介质
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开发用于高面密度和磁化切换控制的能量辅助磁记录介质
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利用自组装纳米结构底层制备铁氧体纳米点及其在超高密度磁记录介质中的应用
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    21245048
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GOALI:位图磁记录介质的制造和器件物理
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