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Composite magnetic films for optically assisted magnetic recording (rapid thermally annealed FePt crystalline grains/magneto optical recording film)

Composite magnetic films for optically assisted magnetic recording (rapid thermally annealed FePt crystalline grains/magneto optical recording film)
光辅助磁记录用复合磁性薄膜(快速热退火FePt晶粒/磁光记录薄膜)
批准号:
18560347
负责人:
ITOH Akiyoshi
金额:
$2.37万
依托单位:
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research (C)
财政年份:
2006
资助国家:
日本
项目状态:
已结题
起止时间:
2006 至 2007

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中文摘要
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英文摘要
In this study, we discussed the composite magnetic recording media, consisting of FePt grain under layer with TbFeCo continuous layer, as high density optically assisted recording media over 1 Tbit/in^2. Due to its high magnetic anisotropy K_u and the capability of forming small grains, FePt is a leading candidate for high density magnetic recording media that are preferable to overcome the thermal fluctuation of small magnetic grains. FePtX (X=Cu, Ni) prepared by Rapid Thermal Annealing (RTA). To increase areal packing density of FePtX grains, a SiO_2 Substrate having self-organized nano-pores was used as a nano-template. Main results were followings1) Fabrication of nano-dent array substrate by self-assemble methodWe succeeded to fabricate SiO_2 film having highly ordered nano-pores inside, and found that the dilution of a solvent with ethanol is effective to thinning the film thickness preparing by spin coring method.2) Decrease of the Curie temperature of FePt by Cu or Ni dopingSubstituting Cu or Ni for some of the Fe is expected to reduce the K_u i. e. Curie temperature T_c (FePt, T_c=500℃ at room temperature). We fabricated well isolated FePtX(X=Cu, Ni) particles by RTA, and confirmed the doping effect to reducing Curie temperature. Deferent content dependence was found in each element.3) Micro-magnetic simulations of domain shape incomposite magnetic recording mediaSimulated result of composite magnetic film consisting of FePt grains under layer and TbFeCo continuous layer shows tiny domain could be formed (domain diameter 22 nm at the TbFeCo surface). Even the spacing between each grain decreased less than the theoretical domain wall width, FePt particles act as domain pinning sites of TbFeCo layer.
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Cu doped FePt Grains Fabricated On SiO2 Substrates Having Self Organized Nano-Pores and domain structure in TbFeCo/FePt CGC-like film
在 SiO2 基底上制备的 Cu 掺杂 FePt 晶粒,在 TbFeCo/FePt CGC 类薄膜中具有自组织纳米孔和域结构
DOI: --
发表时间: 2007
期刊:
影响因子: --
作者: [A. Itoh, A. Tsukamoto, H. Sato, Y. Adachi, M. Motohashi, T. Yoda]
通讯作者: T. Yoda
FeCuPt grains fabricated on SiO_2 substrates having self-organized nano-pores
具有自组织纳米孔的SiO_2基底上制备的FeCuPt晶粒
DOI: --
发表时间: 2006
期刊: J. Magn. Soc. Jpn. 30(6-2)
影响因子: --
作者: [A. Itoh, H. Sato, Y. Adachi, J. Otsuki, A. Tsukamoto]
通讯作者: A. Tsukamoto
DOI: 10.1103/physrevb.73.220402
发表时间: 2006-06-01
期刊: PHYSICAL REVIEW B
影响因子: 3.7
作者: [Stanciu, CD, Kimel, AV, Rasing, T]
通讯作者: Rasing, T
LLG simulations of TbFeCo/ FeNiPt CGC-like film
TbFeCo/ FeNiPt CGC 类薄膜的 LLG 模拟
DOI: --
发表时间: 2006
期刊: J. Magn. Soc. Jpn. 30(6-2)
影响因子: --
作者: [M. Motohashi, F. Chino, A. Itoh, A. Tsukamoto]
通讯作者: A. Tsukamoto
23
    Ultra high density magnetic recording media with self-assembly prepared nano-structured substrate for thermally assisted recording
    • 批准号:
      21560368
    • 项目类别:
      Grant-in-Aid for Scientific Research (C)
    • 资助金额:
      $3.08万
    • 财政年份:
      2009
    • 负责人:
      ITOH Akiyoshi
    • 依托单位:
    Composite magnetic films for ultrahigh density opt-magnetic hybrid recording (Approach from magneto optical recording film)
    • 批准号:
      16360182
    • 项目类别:
      Grant-in-Aid for Scientific Research (B)
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    • 财政年份:
      2004
    • 负责人:
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    • 批准号:
      11650333
    • 项目类别:
      Grant-in-Aid for Scientific Research (C)
    • 资助金额:
      $2.3万
    • 财政年份:
      1999
    • 负责人:
      ITOH Akiyoshi
    • 依托单位:
    Research of the nano-structure of magnets by molecular dynamics simulation and deposition parameter variation sputtering method
    • 批准号:
      09650367
    • 项目类别:
      Grant-in-Aid for Scientific Research (C)
    • 资助金额:
      $1.86万
    • 财政年份:
      1997
    • 负责人:
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    • 依托单位:
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    • 批准号:
      52301234
    • 项目类别:
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    • 资助金额:
      30万元
    • 批准年份:
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    • 负责人:
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    纳米FePt阵列薄膜磁相变温度的调控机制和临界效应研究
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    • 项目类别:
      面上项目
    • 资助金额:
      62万元
    • 批准年份:
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    • 负责人:
      王军
    • 依托单位:
    肿瘤微环境响应型FePt@MnO2纳米探针增强宫颈癌放射治疗的基础研究
    • 批准号:
      12005158
    • 项目类别:
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    • 批准年份:
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    高矫顽力FePt-MgO磁力显微镜探针制备及其高分辨率动态成像机理研究
    • 批准号:
      11964027
    • 项目类别:
      地区科学基金项目
    • 资助金额:
      36.0万元
    • 批准年份:
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