Ruderman-Kittel-Kasuya-Yosida-like ferromagnetism in MnxGe1-x

Yu Jun Zhao; Tatsuya Shishidou; A. J. Freeman

Ruderman-Kittel-Kasuya-Yosida-like ferromagnetism in Mn_xGe_1-x

Yu Jun Zhao, Tatsuya Shishidou, A. J. Freeman

Northwestern University

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

133 Citations (Scopus)

Abstract

Highly precise electronic and magnetic property calculations on Mn_xGe_1-x as a function of the location of Mn sites in a large supercell were used to investigate the nature and origin of ferromagnetism in magnetic semiconductors. For large Mn-Mn distances the coupling was not necessarily ferromagnetic. The exchange interaction between Mn ions obeyed the Ruderman-Kittel-Kasuya-Yosida analytic formula and oscillated as a function of the distance between them. The results explained the experimental effective magnetic moments and the observed large range of Curie temperature in Mn_xGe_1-x.

Original language	English
Article number	047204
Pages (from-to)	472041-472044
Number of pages	4
Journal	Physical review letters
Volume	90
Issue number	4
Publication status	Published - Jan 31 2003

ASJC Scopus subject areas

Physics and Astronomy(all)

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abstract = "Highly precise electronic and magnetic property calculations on MnxGe1-x as a function of the location of Mn sites in a large supercell were used to investigate the nature and origin of ferromagnetism in magnetic semiconductors. For large Mn-Mn distances the coupling was not necessarily ferromagnetic. The exchange interaction between Mn ions obeyed the Ruderman-Kittel-Kasuya-Yosida analytic formula and oscillated as a function of the distance between them. The results explained the experimental effective magnetic moments and the observed large range of Curie temperature in MnxGe1-x.",

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AU - Shishidou, Tatsuya

AU - Freeman, A. J.

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N2 - Highly precise electronic and magnetic property calculations on MnxGe1-x as a function of the location of Mn sites in a large supercell were used to investigate the nature and origin of ferromagnetism in magnetic semiconductors. For large Mn-Mn distances the coupling was not necessarily ferromagnetic. The exchange interaction between Mn ions obeyed the Ruderman-Kittel-Kasuya-Yosida analytic formula and oscillated as a function of the distance between them. The results explained the experimental effective magnetic moments and the observed large range of Curie temperature in MnxGe1-x.

AB - Highly precise electronic and magnetic property calculations on MnxGe1-x as a function of the location of Mn sites in a large supercell were used to investigate the nature and origin of ferromagnetism in magnetic semiconductors. For large Mn-Mn distances the coupling was not necessarily ferromagnetic. The exchange interaction between Mn ions obeyed the Ruderman-Kittel-Kasuya-Yosida analytic formula and oscillated as a function of the distance between them. The results explained the experimental effective magnetic moments and the observed large range of Curie temperature in MnxGe1-x.

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