Origin of spin-glass behavior of Zn1-xMnxO
Abstract
ac susceptibility has been studied for polycrystalline Zn1-xMnxO. 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 Zn1-xMnxO by precipitation of ZnMnO3 in the paramagnetic matrix.
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