Transport properties and origin of ferromagnetism in (Ga,Mn)As

F. Matsukura; H. Ohno; A. Shen; Y. Sugawara

doi:10.1103/PhysRevB.57.R2037

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Transport properties and origin of ferromagnetism in (Ga,Mn)As

F. Matsukura, H. Ohno, A. Shen, and Y. Sugawara

Phys. Rev. B 57, R2037(R) – Published 15 January 1998

Abstract

Magnetotransport properties of $p$ -type ferromagnetic (Ga,Mn)As, a diluted magnetic semiconductor based on III-V semiconductors, are measured and the $p - d$ exchange between holes and Mn $3 d$ spins is determined. The ferromagnetic transition temperatures calculated based on the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction using the exchange reproduce remarkably well the observed ferromagnetic transition temperatures, demonstrating that ferromagnetism of (Ga,Mn)As has its origin in the RKKY interaction mediated by holes.

Received 19 August 1997

DOI:https://doi.org/10.1103/PhysRevB.57.R2037

Authors & Affiliations

F. Matsukura^*, H. Ohno^†, A. Shen, and Y. Sugawara

Laboratory for Electronic Intelligent Systems, Research Institute of Electrical Communication, Tohoku University, Sendai 980-77, Japan

^*Electronic address: f-matsu@riec.tohoku.ac.jp
^†Electronic address: ohno@riec.tohoku.ac.jp

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Vol. 57, Iss. 4 — 15 January 1998

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Physical Review B

covering condensed matter and materials physics