期刊
PHASE TRANSITIONS
卷 84, 期 5-6, 页码 474-482出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/01411594.2011.552014
关键词
BiFeO3; X-ray diffraction; high pressure; deviatoric stress
资金
- French National Research Agency (ANR Blanc PROPER)
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.
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