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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/3986

Title: High T_C ferromagnetism in diluted magnetic semiconducting GaN:Mn films
Authors: Hori, Hidenobu
Sonoda, Saki
Sasaki, Takahiko
Yamamoto, Yoshiyuki
Shimizu, Saburo
Suga, Ken-ichi
Kindo, Koichi
Keywords: Gallium Nitride
Diluted Magnetic Semiconductor
Ferromagnetism
Issue Date: 2002-11
Publisher: Elsevier
Magazine name: Physica B
Volume: 324
Number: 1-4
Start page: 142
End page: 150
DOI: 10.1016/S0921-4526(02)01288-7
Abstract: Wurtzite GaN:Mn films with an extremely high Curie temperature of around 940 K and Mn concentration of only 3 to 5% are successfully grown on sapphire substrates by molecular beam epitaxy. Magnetization measurements are carried out using magnetic fields of up to 7 T parallel to the film surface. The magnetization process reveals the coexistence of ferromagnetic and paramagnetic contributions at low temperatures, with characteristic ferromagnetic magnetization at high temperatures. The observed transport characteristics demonstrate a close relation between magnetism and impurity conduction. The double exchange mechanism of the Mn-impurity band is presented as a possible models for the high-T_C ferromagnetism in GaN:Mn.
Rights: Elsevier, Ltd., Physica B: Condensed Matter, 324(1-4), 2002, 142-150. http://www.sciencedirect.com/science/journal/09214526
Type: Article
URI: http://hdl.handle.net/10119/3986
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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