Theoretical Study for Ferromagnetic/Nonmagnetic Metallic Multilayrs

铁磁/非磁金属多层膜的理论研究

基本信息

  • 批准号:
    08640446
  • 负责人:
  • 金额:
    $ 1.34万
  • 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:
    1996
  • 资助国家:
    日本
  • 起止时间:
    1996 至 1997
  • 项目状态:
    已结题

项目摘要

1) The perpendicular magnetic anisotropy energy in the ferromagnetic/nonmagnetic metallic multilayrs were investigated calculating the electronic structures by LMTO-ASA method within the framework of the local-density-approximation, for X/Co (X= Pd, Pt, Cu, Ag, Au, Ni) and X/Fe (X=Ag, Au, Ni) systems. We have found that the general tendency of the perpendicular magnetic anisotropy energy (MAE) in these systems are well explained by first-principles calculations. The thickness of Co (ferromagnetic) layr dependence and the strain dependence of the MAE were also investigated.2) The magnetic properties of rare-earth and 3d transition metal compounds are enhanced by the addition of N,C or B.We have calculated the electronic charge density maps and the spindensity maps of GdFe_<12>, GdFe_<12>N,Gd_2Fe_<17> and Gd_2Fe_<17>N_3 by the FLAPW method and clarified the microscopic origin of the strong uniaxial magnetic anisotropy energy due to the addition of N or C.It was also found that the addition of N is most effective to enhance the magnetism of these compounds.3)We have also calculated the MAE due to the spin-orbit coupling of 3d transition metal itself for YCo_5, Y_2Co_7, YCo_3 and Y_2Co_<17> by the LMTO method including the spin-orbit coupling term.4)We have also performed the preliminary calculation of the magneto-optical (Kerr) effect by the LMTO method for hcp-Co, fcc-Co, and ferromagnetic/nonmagnetic metallic multilayrs Fe (nML) /Au (nML) (n=1,2,3,4) and TM (1ML) /X (2ML)(TM=Mn, Fe, Co ; X=Pd, Pt, Ag, Au) systems.5)We have also performed the first principles calculations to predict theoretically new half-metallic compounds to realize the half-metallic/nonmagnetic multilayr.
1) 研究了铁磁/非磁金属多层膜中的垂直磁各向异性能量,通过 LMTO-ASA 方法在局域密度近似框架内计算 X/Co(X= Pd、Pt、Cu、Ag、Au、Ni)和 X/Fe(X=Ag、Au、Ni)系统的电子结构。我们发现,第一性原理计算可以很好地解释这些系统中垂直磁各向异性能量(MAE)的总体趋势。还研究了Co(铁磁)层厚度依赖性和MAE应变依赖性。2)通过添加N、C或B增强了稀土和3d过渡金属化合物的磁性。我们计算了GdFe_<12>、GdFe_<12>N、Gd_2Fe_<17>和GdFe_<12>、GdFe_<12>N、Gd_2Fe_<17>和 通过FLAPW方法对Gd_2Fe_<17>N_3进行了研究,并阐明了由于N或C的添加而产生的强单轴磁各向异性能量的微观根源。还发现N的添加对增强这些化合物的磁性最有效。3)我们还计算了YCo_5、Y_2Co_7、YCo_3由于3d过渡金属本身的自旋轨道耦合而产生的MAE 和 Y_2Co_<17> 通过包含自旋轨道耦合项的 LMTO 方法进行。4)我们还通过 LMTO 方法对 hcp-Co、fcc-Co 和铁磁性/非磁性金属多层 Fe (nML) /Au (nML) (n=1,2,3,4) 的磁光(Kerr)效应进行了初步计算 和TM(1ML)/X(2ML)(TM=Mn,Fe,Co;X=Pd,Pt,Ag,Au)系统。5)我们还进行了第一性原理计算,以预测理论上新的半金属化合物,以实现半金属/非磁性多层。

项目成果

期刊论文数量(36)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
M.Yamaguchi and S.Asano: "First-principles calculations of the 3d magneto-crystalline anisotropy energy of YCo_5, Y_2Co_7, YCo_3, and Y_2Co_<17>" J.Magn.Magn.Matt. 168. 161-168 (1997)
M.Yamaguchi 和 S.Asano:“YCo_5、Y_2Co_7、YCo_3 和 Y_2Co_<17> 3d 磁晶各向异性能量的第一原理计算”J.Magn.Magn.Matt。
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S.Ishida: "Effects on electronic structures of atomic configuratons in ternacy compounds Ni-M-Z(M=Sc,Ti,Zr,Hf;Z=Sn,Sb)" Physica B. 237-238. 363-364 (1997)
S.Ishida:“三元化合物 Ni-M-Z(M=Sc,Ti,Zr,Hf;Z=Sn,Sb) 中原子构型的电子结构的影响”Physica B. 237-238。
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K.Kyuno: "Perpendicular Magnetic anisotropy of Metallic Multilayers Ni/Co and Ni/Fe" Jpn.J.Appl.Phys.35. 2774-2778 (1996)
K.Kyuno:“金属多层 Ni/Co 和 Ni/Fe 的垂直磁各向异性”Jpn.J.Appl.Phys.35。
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K.Kyuno: "Theoretical Study on the Co Layer thickness Dependence of the Magnetic anisotropy of Pd/Co Multilayers" Solid State Comm.98. 327-332 (1996)
K.Kyuno:“Pd/Co 多层磁各向异性的 Co 层厚度依赖性的理论研究”Solid State Comm.98。
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K.Kyuno: "Perpendicular Magnetic Anisotropy of Metallic Multilayers Composed of Magnetic Layers Only:Ni/Co and Ni/Fe." Jpn・J.Appl.Phys.35. 2774-2778 (1996)
K.Kyuno:“仅由磁性层组成的金属多层的垂直磁各向异性:Ni/Co 和 Ni/Fe。”Jpn・J.Appl.Phys.35 (1996)。
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ASANO Setsuro其他文献

ASANO Setsuro的其他文献

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{{ truncateString('ASANO Setsuro', 18)}}的其他基金

Theoretical Study of the Magneto-Optical Effect in Transition Metal Alloys and Multilayers
过渡金属合金和多层膜磁光效应的理论研究
  • 批准号:
    10640333
  • 财政年份:
    1998
  • 资助金额:
    $ 1.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Theoretical Study of Spin-Orbit Coupling in Metallic Ferromagnetism
金属铁磁性中自旋轨道耦合的理论研究
  • 批准号:
    06640468
  • 财政年份:
    1994
  • 资助金额:
    $ 1.34万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
Energy Band Calculation of the Compounds with Rare Earth and Transition metals
稀土和过渡金属化合物的能带计算
  • 批准号:
    61540224
  • 财政年份:
    1986
  • 资助金额:
    $ 1.34万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

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