Effect of nano-oxide layers on giant magnetoresistance in pseudo-spin-valves using Co<sub>2</sub>FeAl electrodes期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Effect of nano-oxide layers on giant magnetoresistance in pseudo-spin-valves using Co₂FeAl electrodes

Authors:	DL ZhangXG Xu Y WuJ Miao Y Jiang

Institution:	State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

Abstract:	We studied the pseudo-spin-valves (PSVs) with a structure of Ta/Co₂FeAl/NOL₁/Co₂FeAl/Cu/Co₂FeAl/NOL₂/Ta, where NOL represents the nano-oxide layer. Compared with the normal Co₂FeAl (CFA) PSV with a structure of Ta/Co₂FeAl/Cu/Co₂FeAl/Ta, which shows only a current-in-plane (CIP) giant magnetoresistance (GMR) of 0.03%, the CFA PSV with NOLs shows a large CIP-GMR of 5.84%. The enhanced GMR by the NOLs inserted in the CFA PSV is due to the large specular reflection caused by (CoO)(Fe₂O₃)(Al₂O₃)] in NOL₁ and (Fe₂O₃)(Al₂O₃)(Ta₂O₅)] in NOL₂. Another reason is that the roughness of the interface between Ta and CFA is improved by the oxidation procedure.

Keywords:	Nano-oxide layers Heusler alloy Giant magnetoresistance
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