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Oxygen vacancy induced re-entrant spin glass behavior in multiferroic ErMnO3 thin films

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arxiv 0901.4651 v1 pith:SWQMGME7 submitted 2009-01-29 cond-mat.str-el cond-mat.other

Oxygen vacancy induced re-entrant spin glass behavior in multiferroic ErMnO3 thin films

S. Y. Jang , D. Lee , J.-H. Lee , T. W. Noh , Y. Jo , M.-H. Jung , J.-S. Chung This is my paper
classification cond-mat.str-el cond-mat.other
keywords filmsbehaviorermno3glassoxygenspinexhibitedhexagonal
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Epitaxial thin films of hexagonal ErMnO3 fabricated on Pt(111)/Al2O3(0001) and YSZ(111) substrates exhibited both ferroelectric character and magnetic ordering at low temperatures. As the temperature was reduced, the ErMnO3 films first showed antiferromagnetism. At lower temperatures, the films deposited at lower oxygen partial pressures exhibited spin glass behavior. This re-entrant spin glass behavior was attributed to competition between an antiferromagnetic interaction in the hexagonal geometry and a ferromagnetic interaction caused by a change in Mn valence induced by excess electrons from the oxygen vacancies.

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