Enhancement of exchange bias by ultra‐thin Mn layer insertion at the interface of Mn‐Ir/Co‐Fe bilayers
Enhancement of exchange bias by ultra‐thin Mn layer insertion at the interface of Mn‐Ir/Co‐Fe bilayers
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DOI：
10.1002/pssb.200777391
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发表时间：
2007-12
期刊：
影响因子：
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通讯作者：
M. Tsunoda;S. Yoshitaki;Y. Ashizawa;Dong Young Kim;C. Mitsumata;M. Takahashi
中科院分区：
文献类型：
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作者：
M. Tsunoda;S. Yoshitaki;Y. Ashizawa;Dong Young Kim;C. Mitsumata;M. Takahashi
研究了在界面处插入超薄Mn、Ru、Pd、Ta、Gd和Tb层对Mn 75 Ir 25/Co 70 Fe 30双层膜交换偏置的影响。随着0.5 nm厚Mn层的插入，双层的单向各向异性常数JK从0.46 erg/cm 2显著提高到0.84 erg/cm 2，而对于其他材料，随着插入层厚度的增加而降低。在Ir含量为0原子%~ 40原子%的范围内，对于Mn-Ir层的化学组成的JK的变化，没有得到0.84 erg/cm 2的值。用超薄Mn插入的JK增强的原因可能是由于界面处的反铁磁自旋结构的修改。（© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
Effects of ultra‐thin Mn, Ru, Pd, Ta, Gd, and Tb layer insertion at the interface on the exchange bias of Mn75Ir25/Co70Fe30 bilayers were investigated. Unidirectional anisotropy constant, JK, of the bilayer was significantly enhanced from 0.46 erg/cm2 to 0.84 erg/cm2 with the insertion of 0.5‐nm‐thick Mn layer, while it was reduced with increasing the inserted layer thickness for the other materials. The value of 0.84 erg/cm2 was not obtained in the variation of JK with respect to the chemical composition of Mn‐Ir layer in a range of Ir content of 0 ∼ 40 at.%. The cause of the enhancement of JK with ultra‐thin Mn insertion might be due to the modification of antiferromagnetic spin structure at the interface. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)