Temperature‐dependent Raman scattering in ferroelectric Bi4−xNdxTi3O12(x = 0, 0.5, 0.85) single crystals

Journal of Raman Spectroscopy - Tập 40 Số 12 - Trang 2088-2091 - 2009
Kun Liang1, Yajun Qi2,1,3, Chaojing Lu2,1,4,3
1Department of Materials Science and Engineering, Hubei University, Wuhan 430062, China
2Chaojing Lu, Laboratory of Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, China.
3Yajun Qi, Department of Materials Science and Engineering, Hubei University, Wuhan 430062, China.
4Laboratory of Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, China

Tóm tắt

AbstractThe temperature‐dependent Raman spectra of ferroelectric Bi4−xNdxTi3O12(x = 0, 0.5, 0.85) single crystals were recorded from 100 to 800 K. It was found that there is a critical Nd content x0 between 0.5 and 0.85. The Nd3+ ions prefer to replace Bi3+ ions in pseudo‐perovskite layers when x < x0, while they might begin to incorporate into (Bi2O2)2+ layers when x ≥ x0. Nd substitution leads to a decrease in the ferroelectric–paraelectric transition temperature (Tc). A monoclinic distortion of orthorhombic structure occurs in Bi4Ti3O12 crystals at temperatures below 200 K. Copyright © 2009 John Wiley & Sons, Ltd.

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Thông tin xuất bản

Journal of Raman Spectroscopy

Tập 40 Số 12

2088-2091

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