Large Tunnel Magnetoresistance of Full-Heusler CoFeAlSi Alloy Granular Films
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概要
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The tunnel magnetoresistance (TMR) and the structure of full-Heusler CoFeAlSi (CFAS)--Al2O3 granular films have been investigated. It was found that the most part of the film was in discontinuous layers after annealing at 673 K. A maximum MR ratio of about 18% was obtained at room temperature under a magnetic field of 8 kOe. The X-ray diffraction pattern of the film exhibited a weak peak of CFAS(220) and/or MgO(200) at about 45°, and a halo-like pattern with two peaks within the range 20--30°. These results suggest that the high MR ratio observed is related to the existence of granules with high spin polarization.
- 2011-12-25
著者
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Jimbo Mutsuko
Department of Electrical and Electronic Engineering, Daido University, Nagoya 457-8530, Japan
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Fujiwara Yuji
Graduate School of Engineering, Mie University, Tsu 514-8507, Japan
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Kondo Michiaki
Department of Electrical and Electronic Engineering, Daido University, Nagoya 457-8530, Japan
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Chino Takuro
Department of Electrical and Electronic Engineering, Daido University, Nagoya 457-8530, Japan
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