Origin of spin-glass behavior of Zn_1-xMn_xO

Details Origin of spin-glass behavior of Zn_1-xMn_xO Origin of spin-glass behavior of Zn_1-xMn_xO

2002-07-15

arxiv.org/abs/cond-mat/0207349v1

Physics

Condensed Matter

Materials Science

5 pages, 6 figures, RevTeX, To be published in J. Supercond.: Incorp. Novel Materials

Scientific paper

ac susceptibility has been studied for polycrystalline Zn$_{1-x}$Mn$_x$O. Stoichiometric samples demonstrate Curie-Weiss behavior, which indicates mostly antiferromagnetic interactions. Magnetic susceptibility can be described by a diluted Heisenberg magnet model developed for semimagnetic semiconductors. High-pressure oxygen annealing induces spin-glass like behavior in Zn$_{1-x}$Mn$_x$O by precipitation of ZnMnO$_3$ in the paramagnetic matrix.

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