Specific heat study of GaMnAs

Shavkat Yuldashev; Khusan Igamberdiev; Sejoon Lee; Younghae Kwon; Yongmin Kim; Hyunsik Im; Anatoly Shashkov; Tae Won Kang

doi:10.1143/APEX.3.073005

Specific heat study of GaMnAs

Shavkat Yuldashev
, Khusan Igamberdiev
, Sejoon Lee
, Younghae Kwon
, Yongmin Kim
, Hyunsik Im
, Anatoly Shashkov
, Tae Won Kang

Division of System Semiconductor

Dongguk University
Belarus Academy of Sciences

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Specific heat was used to study the magnetic phase transition in GaMnAs. Two types of samples were investigated. The sample with a Mn concentration of 1.6% shows an insulating behavior whereas the sample with a Mn concentration of 2.6% is metallic. The temperature dependence of the specific heat for both samples reveals a lambda-shaped peak near the Curie temperature, which indicates a second-order phase transition is occuring in these samples. The critical behavior of the specific heat for the GaMnAs samples is consistent with the mean-field behavior with Gaussian fluctuations of the magnetization in the vicinity of TC.

Original language	English
Article number	073005
Journal	Applied Physics Express
Volume	3
Issue number	7
DOIs	https://doi.org/10.1143/APEX.3.073005
State	Published - Jul 2010

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title = "Specific heat study of GaMnAs",

abstract = "Specific heat was used to study the magnetic phase transition in GaMnAs. Two types of samples were investigated. The sample with a Mn concentration of 1.6\% shows an insulating behavior whereas the sample with a Mn concentration of 2.6\% is metallic. The temperature dependence of the specific heat for both samples reveals a lambda-shaped peak near the Curie temperature, which indicates a second-order phase transition is occuring in these samples. The critical behavior of the specific heat for the GaMnAs samples is consistent with the mean-field behavior with Gaussian fluctuations of the magnetization in the vicinity of TC.",

author = "Shavkat Yuldashev and Khusan Igamberdiev and Sejoon Lee and Younghae Kwon and Yongmin Kim and Hyunsik Im and Anatoly Shashkov and Kang, \{Tae Won\}",

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T1 - Specific heat study of GaMnAs

AU - Yuldashev, Shavkat

AU - Igamberdiev, Khusan

AU - Lee, Sejoon

AU - Kwon, Younghae

AU - Kim, Yongmin

AU - Im, Hyunsik

AU - Shashkov, Anatoly

AU - Kang, Tae Won

PY - 2010/7

Y1 - 2010/7

N2 - Specific heat was used to study the magnetic phase transition in GaMnAs. Two types of samples were investigated. The sample with a Mn concentration of 1.6% shows an insulating behavior whereas the sample with a Mn concentration of 2.6% is metallic. The temperature dependence of the specific heat for both samples reveals a lambda-shaped peak near the Curie temperature, which indicates a second-order phase transition is occuring in these samples. The critical behavior of the specific heat for the GaMnAs samples is consistent with the mean-field behavior with Gaussian fluctuations of the magnetization in the vicinity of TC.

AB - Specific heat was used to study the magnetic phase transition in GaMnAs. Two types of samples were investigated. The sample with a Mn concentration of 1.6% shows an insulating behavior whereas the sample with a Mn concentration of 2.6% is metallic. The temperature dependence of the specific heat for both samples reveals a lambda-shaped peak near the Curie temperature, which indicates a second-order phase transition is occuring in these samples. The critical behavior of the specific heat for the GaMnAs samples is consistent with the mean-field behavior with Gaussian fluctuations of the magnetization in the vicinity of TC.

UR - https://www.scopus.com/pages/publications/77954518566

U2 - 10.1143/APEX.3.073005

DO - 10.1143/APEX.3.073005

M3 - Article

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SN - 1882-0778

VL - 3

JO - Applied Physics Express

JF - Applied Physics Express

IS - 7

M1 - 073005

ER -

Specific heat study of GaMnAs

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