(PLZT)_x(BiFeO_3)_<1-x>固溶体の強誘電性と磁気特性 : 磁気光学・光磁気記録

概要

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(PLZT)_x(BiFeO_3)_<1-x> solid solutions exhibiting both ferroelectricity and ferromagnetism were prepared by a solid-state reaction. X-ray diffraction patterns showed that the crystal structure of the solid solutions for x = 0.1-1.0 was a cubic perovskite structure, but Raman spectra suggested the existence of a rhombohedral-type local polar order. The temperature dependence of ferroelectricity indicates that the materials for the whole range of x are ferroelectric relaxors. The materials for x = 0.10-0.45 simultaneously showed ferroelectric and magnetic hysteresis loops at room temperature. The Neel temperatures of the materials decreased with increasing x, e.g., 640 K (x=0), 585 K (x= 0.10), and 570 K (x=0.15). The possible origins of the weak spontaneous magnetization in the present system are also discussed.
社団法人日本磁気学会の論文
2002-04-01