Tunneling spectroscopy of the Heusler compound Co2Cr0.6Fe0.1Al
Tunneling spectroscopy of the Heusler compound Co2Cr0.6Fe0.1Al
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Heusler化合物Co2Cr0.6Fe0.1Al的隧道光谱
DOI：
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
H. Adrian
中科院分区：
文献类型：
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作者：
M. Jourdan;A. Conca;C. Herbort;M. Kallmayer;H. Elmers;H. Adrian
研究了具有Heusler化合物Co2Cr0.6Fe0.4Al (CCFA)的隧道结的偏置电压和磁化方向相关的微分电导Di/dV(Vbias)。这些结包含AlOx隧道势垒和Co对电极。在偏压为≃±5 0 0 mV时，最显著的特征是平行电极磁化的微分电导有明显的肩部，隧道磁阻有一个符号变化。在能带结构相关效应和非弹性激发的框架下对测量进行了讨论。X射线吸收光谱(XAS-Tey)研究表明，与溅射靶成分相比，CCFA/Al界面的Fe含量增加，这可能是由于Fe缓冲层的相互扩散所致。
The bias voltage and magnetization direction dependent differential conductivity dI∕dV(Vbias) of tunneling junctions with the Heusler compound Co2Cr0.6Fe0.4Al (CCFA) was investigated. The junctions contain AlOx tunneling barriers and Co counter electrodes. A pronounced shoulder in the differential conductivity with parallel electrode magnetization and a sign change of the tunneling magnetoresistance at a bias voltage of ≃±500 mV were the most prominent features observed. The measurements are discussed in the framework of band structure related effects and inelastic excitations. X-ray absorption spectroscopy (XAS-TEY) investigations show that the CCFA/Al interface has an increased Fe content compared to the sputter target composition, presumably due to Fe buffer layer interdiffusion.
Co2Cr0 6Fe0 4Al Heusler合金薄膜表面磁性的降低
影响因子：
4
作者：
M. Kallmayer;H. Schneider;G. Jakob;H. J. Elmers;K. Kroth;H. C. Kandpal;U. Stumm;S. Cramm
通讯作者：
S. Cramm