Tunneling spectroscopy of the heusler compound Co2Cr0.6Fe0.1Al

被引：8
|
作者：
Jourdan, M. [1 ]
Conca, A. [1 ]
Herbort, C. [1 ]
Kallmayer, M. [1 ]
Elmers, H. J. [1 ]
Adrian, H. [1 ]
机构：
[1] Johannes Gutenberg Univ Mainz, Inst Phys, D-55128 Mainz, Germany
来源：
JOURNAL OF APPLIED PHYSICS | 2007年 / 102卷 / 09期
关键词：
D O I：
10.1063/1.2805399
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The bias voltage and magnetization direction dependent differential conductivity dI/dV(V-bias) 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 similar or equal to +/- 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. (C) 2007 American Institute of Physics.
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页数：3
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