Almeida-Thouless Line in BiFeO3: Is Bismuth Ferrite a mean field spin glass?

Details Almeida-Thouless Line in BiFeO3: Is Bismuth Ferrite a mean field spin glass? Almeida-Thouless Line in BiFeO3: Is Bismuth Ferrite a mean field spin glass?

2008-11-14

arxiv.org/abs/0811.2347v1

J. Phys.: Condens. Matter 21 (2008) 042202

Physics

Condensed Matter

Materials Science

Submitted to J. Phys. Cond. Matter

Scientific paper

10.1088/0953-8984/21/4/042202

Low-temperature magnetic properties of epitaxial BiFeO3 thin films grown on (111)-SrTiO3 substrates have been studied. ZFC and FC magnetization curves show a large discrepency beginning at a characteristic temperature Tf that is dependent on the magnetic-field strengh. Tf(H) varies according to the well known de Aleimda-Thouless line (varies in Hexp(2/3)) suggesting an acentric long rnage spin-glass behavior and mean field system.

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