Monoclinic MB phase and phase instability in [110] field cooled Pb(Zn1/3Nb2/3)O3–4.5%PbTiO3 single crystals

Jianjun Yao; Hu Cao; Wenwei Ge; Jiefang Li; Viehland, D.
August 2009
Applied Physics Letters;8/3/2009, Vol. 95 Issue 5, p052905
Academic Journal
We report the finding of a monoclinic MB phase in Pb(Zn1/3Nb2/3)O3–4.5%PbTiO3 single crystals. High precision x-ray diffraction investigations of [110] field cooled crystals have shown a transformation sequence of cubic(C)→tetragonal(T)→orthorhombic(O)→monoclinic(MB), which is different from that previously reported [A.-E. Renault et al., J. Appl. Phys. 97, 044105 (2005)]. Beginning in the zero-field-cooled condition at 383 K, a rhombohedral (R)→MB→O sequence was observed with increasing field. Coexisting MB and O phases were then found upon removal of field, which fully transformed to MB on cooling to room temperature.


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