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arXiv 1107.5801cond-mat.mtrl-sci
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BiFeO3薄膜的室温相变

Phase transition close to room temperature in BiFeO3 thin films

J. Kreisel, P. Jadhav, O. Chaix-Pluchery, M. Varela, N. Dix, F. Sanchez, J. Fontcuberta

摘要:

BiFeO 3(BFO)多铁性氧化物具有复杂的相图,可以通过适当的衬底诱导的应变在外延膜映射。通过使用拉曼光谱,我们最终表明,薄膜的所谓supertetraxite T-BFO相,稳定的压缩应变下,显示可逆的温度诱导的相变在约100 \circ,从而接近室温。

英文摘要:

BiFeO3 (BFO) multiferroic oxide has a complex phase diagram that can be mapped by appropriately substrate-induced strain in epitaxial films. By using Raman spectroscopy, we conclusively show that films of the so-called supertetragonal T-BFO phase, stabilized under compressive strain, displays a reversible temperature-induced phase transition at about 100\circ, thus close to room temperature.

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