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金属磁性多层膜的新颖特性──巨磁电阻效应 总被引:4,自引:0,他引:4
磁性和非磁性层交替重构成的金属磁性多层膜常具有巨磁电阻效应,其中每层膜约几个纳米厚。出现巨磁电阻效应的基本条件是:在外磁场下相邻磁层磁化强度取向发生对变化。巨磁电阻效应的物理起源是,其自旋与局域磁化强度平行和反平行的电子受到的散射不同,散射的不同既要嗵来自获射中收的特性,又可能源于两种自旋电子的能态密度的差异。由于信息存储技术中磁电阻“读出”磁头有巨大的应用前景,巨磁电阻效应引起了人们的极大兴趣。 相似文献
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Magnetic properties and nanostructures of FePtCu:C thin films with FePt underlayers (ULs) are studied. The effect of FePt ULs on the orlentation and magnetic properties of the thin films are investigated by adjusting FePt UL thicknesses from 2nm to 14nm. X-ray diffraction (XRD) scans reveal that the orientation of the films is dependent on FePt UL thickness. For a 5-nm FePtCu:C nanocomposite thin film with a 2-nm FePt UL, the coercivity is 6.S KOe, the correlation length is 59 nm, the desired face-centred-tetragonal (fct) ordered structure [Llo phase] is formed and the c axis normal to the film plane [(001) texture] is obtained. These results indicate that the beffer orientation and magnetic properties of the films can be tuned by decreasing the thockness of the FePt UL. 相似文献
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