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Local structure analysis of Bi(Mg$$_{0.5}$$Ti$$_{0.5}$$)O$$_3$$ grown by high pressure synthesis

Yoneda, Yasuhiro   ; Saito, Hiroyuki; Yoshii, Kenji  

Bi(Mg$$_{0.5}$$Ti$$_{0.5}$$)O$$_3$$ (BMT) was grown by high-pressure and high-temperature synthesis to achieve the morphotropic phase boundary induced by pressure. Two types of BMT was obtained; one has orthorhombic structure and the other has rhombohedral structure. ${it In-situ}$ high-pressure and high-temperature X-ray diffraction measurements were performed, and it clarified that the orthorhombic structure is stabilized in the ambient pressure phase and the rhombohedral structure is stabilized in the high pressure phase. We also performed local structure analysis by using pair-distribution function analysis. The similarity of local structures in the orthorhombic and rhombohedral BMT was revealed, and it was also the phase transition mechanism to the high-pressure rhombohedral phase.

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Category:Physics, Applied

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