Specific heat study of Ga1-xMnxAs

Abstract

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.

12 pages, 5 figures

References in corpus (3)

• Visualizing Critical Correlations near the Metal-Insulator Transition in Ga1-xMnxAs
• Curie point singularity in the temperature derivative of resistivity in (Ga,Mn)As
• Optical Properties of III-Mn-V Ferromagnetic Semiconductors

Cited by in corpus (5)

• Dilute ferromagnetic semiconductors: Physics and spintronic structures
• Spin-dependent phenomena and device concepts explored in (Ga,Mn)As
• Thermodynamic and thermoelectric properties of (Ga,Mn)As and related compounds
• Anomalous critical point behavior in dilute magnetic semiconductor (Ca,Na)(Zn,Mn)2Sb2
• Crossover critical behavior of Ga1-xMnxAs