日本応用磁気学会誌
Online ISSN : 1880-4004
Print ISSN : 0285-0192
ISSN-L : 0285-0192
論文
Mn1-xCrxTe 薄膜のマグノン・ドラッグ効果
横沼 実雄若月 政幸草田 祐一小柳 剛松原 覚衛
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1995 年 19 巻 3 号 p. 723-726

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The crystal structure and thermoelectric properties of Mn1-xCrxTe (0≤x≤0.3) films prepared on glass substrates by vacuum evaporation were investigated. X-ray diffraction measurements showed that the solubility limit of Cr in the NiAs-type MnTe phase for Mn1-xCrxTe films is x=0.06. For films in which 0≤x≤0.06, the Neel temperature TNopt, which was determined from the deflection point in the temperature dependence curve of the optical band gap, shifts strongly toward higher temperatures from TNopt,=327 K (x=0) to TNopt,=460 K (x=0.06) with an increase in x. The Seebeck coefficient S of the films reaches a maximum around TNopt, indicating that the enhancement of S can be attributed to the magnon-drag effect. On the other hand, for x >0.06, the temperature at which S reaches a maximum does not change with x, and S decreases markedly owing to the presence of a metallic Cr2Te3 phase.

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© 1995 (社)日本応用磁気学会
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