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Article Dans Une Revue Phase Transitions Année : 2011

High-pressure phase transitions in BiFeO3: hydrostatic versus non-hydrostatic conditions

Résumé

We report high pressure X-ray diffraction experiments on BiFeO3 (BFO) single crystals in diamond-anvil cells up to 14 GPa. Two data sets are compared, one in hydrostatic conditions, with helium used as a pressure-transmitting medium (PTM), and the other in non-hydrostatic conditions, with silicon oil as a PTM. It is shown that the crystal undergoes different phase transitions in the two cases, highlighting the high sensitivity of BFO to non-hydrostatic stress. Consequences for the interpretation of high pressure structural studies are discussed.

Domaines

Matériaux

Dates et versions

hal-01067366 , version 1 (23-09-2014)

Identifiants

Citer

M. Guennou, P. Bouvier, R. Haumont, G. Garbarino, J. Kreisel. High-pressure phase transitions in BiFeO3: hydrostatic versus non-hydrostatic conditions. Phase Transitions, 2011, 84 (5-6), pp.474-482. ⟨10.1080/01411594.2011.552014⟩. ⟨hal-01067366⟩
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