日本結晶学会誌
Online ISSN : 1884-5576
Print ISSN : 0369-4585
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BiCo1-xFexO3の分極回転現象
岡 研吾東 正樹森 茂生
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55 巻 (2013) 5 号 p. 278-284

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Polarization rotation is the key for interpretation of the piezoelectricity in Pb(Ti1-xZrx)O3(PZT)and other piezoelectric ceramics. We found the monoclinic phase in BiCo1-xFexO3x~0.7)that is isostructural with the low temperature phase of PZT at the morphotropic phase boundary(MPB). Precise structural analysis by electron diffraction and powder synchrotron X-ray diffraction revealed that the monoclinic perovskite BiCo1-xFexO3 exhibits Cm symmetry and showed polarization rotation as functions of composition and temperature. The second order structural transition from tetragonal to monoclinic structures was accompanied by a rotation of the polarization vector from the[001]to[111]directions of a pseudo cubic cell.

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