Specific heat study of Ga1-xMnxAs

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 temperatu...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Yuldashev, Sh U, Igamberdiev, Kh T, Lee, Sejoon, Kwon, Y H, Kang, T W, Kim, Yongmin, Im, Hyunsik, Shashkov, A G
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 05.06.2010
Subjects
Curie temperature
Heat
Phase transitions
Physics - Materials Science
Specific heat
Temperature dependence
Variations
Online AccessGet full text

Cover

More Information
Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1006.1023