Superparamagnetic relaxation Mössbauer spectra by phonon–magnon interaction using the multilevel method |
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| Authors: | H-D Pfannes D S Vieira Junior R Paniago J H Dias Filho |
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| Institution: | (1) Departamento de Física, Universidade Federal de Minas Gerais, C. P. 702, 30123-970 Belo Horizonte, M.G., Brazil;(2) Departamento de Ciências Exatas, Universidade Estadual de Montes Claros, C. P. 126, 39401-089 Montes Claros, M.G., Brazil |
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| Abstract: | The formation of local moments and the effect of charge carrriers in dilute magnetic semiconductors can be well understood using local probe techniques like Mossbauer Spectroscopy. We report here on Mossbauer studies in the systems Fe0.008Ge1 ? x D x (D = As, Bi), Fe0.008Ge1 ? x In x , and Fe0.008Ge1 ? x Sn x . At room temperature magnetic interactions were observed for donor (D) impurities at the Fe site in the Fe0.008Ge system. No such magnetic ordering was observed for acceptor (In) or neutral (Sn) impurities. |
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| Keywords: | superparamagnetism M?ssbauer spin relaxation spectra phonon– magnon interaction |
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