Magnetotransport in (Ga,Mn)N Ferromagnetic Semiconductors Grown by Plasma-Enhanced Molecular Beam Epitaxy
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概要
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We present the ferromagnetism and magnetotransport properties in the (Ga,Mn)N epitaxial films with different Mn concentrations grown by plasma-enhanced molecular beam epitaxy. The (Ga,Mn)N epitaxial films were obviously found to exhibit ferromagnetic ordering with Curie temperature exceeding room temperature. The anomalous Hall effect is observed to persist up to 250 K and found to gradually increase with decreasing temperature. The negative magnetoresistance was observed below 50 K. The ferromagnetism in the $n$-type (Ga,Mn)N is due to the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between the localized Mn moments mediated by the electron gas.
- 2003-11-15
著者
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HAM Moon-Ho
Information & Electronic Material Research Laboratory, Department of Materials Science and Engineeri
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LEE Woo-Young
Information & Electronic Material Research Laboratory, Department of Materials Science and Engineeri
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MYOUNG Jae-Min
Information & Electronic Material Research Laboratory, Department of Materials Science and Engineeri
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Chang Joon-yeon
Nano Device Research Center Korea Institute Of Science And Technology
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Han Suk-hee
Nano Device Research Center Korea Institute Of Science And Technology
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Lee Woo-Young
Information & Electronic Material Research Laboratory, Department of Materials Science and Engineering, Yonsei University, Seoul 120-749, Korea
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Jeong Min-Chang
Information & Electronic Material Research Laboratory, Department of Materials Science and Engineering, Yonsei University, Seoul 120-749, Korea
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Ham Moon-Ho
Information & Electronic Material Research Laboratory, Department of Materials Science and Engineering, Yonsei University, Seoul 120-749, Korea
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Han Suk-Hee
Nano Device Research Center, Korea Institute of Science and Technology, P.O. Box 131, Seoul 130-650, Korea
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Myoung Jae-Min
Information & Electronic Material Research Laboratory, Department of Materials Science and Engineering, Yonsei University, Seoul 120-749, Korea
関連論文
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