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arxiv: 1006.1023 · v1 · pith:TE25EQ6Xnew · submitted 2010-06-05 · ❄️ cond-mat.mtrl-sci

Specific heat study of Ga1-xMnxAs

Sh. U. Yuldashev , Kh. T. Igamberdiev , Sejoon Lee , Y. H. Kwon , T. W. Kang , Yongmin Kim , Hyunsik Im , A.G. Shashkov This is my paper
classification ❄️ cond-mat.mtrl-sci
keywords ga1-xmnxasheatsamplesspecificbehaviorconcentrationphasesample
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Specific heat measurements were used to study the magnetic phase transition in Ga1-xMnxAs. Two different types of Ga1-xMnxAs samples have been investigated. The sample with a Mn concentration of 1.6% shows insulating behavior, and the sample with a Mn concentration of 2.6% is metallic. The temperature dependence of the specific heat for both samples reveals a pronounced lambda-shaped peak near the Curie temperature, which indicates a second-order phase transition in these samples. The critical behavior of the specific heat for Ga1-xMnxAs samples is consistent with the mean-field behavior with Gaussian fluctuations of the magnetization in the close vicinity of TC.

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