Enhancement of ferroelectricity in Cr-doped Ho2Ti2O7

被引：18
作者：
Dong, X. W. [1 ]
Dong, S. [2 ]
Wang, K. F. [1 ]
Wan, J. G. [1 ]
Liu, J. -M. [1 ,3 ]
机构：
[1] Nanjing Univ, Solid State Microstruct Lab, Nanjing 210093, Peoples R China
[2] Southeast Univ, Dept Phys, Nanjing 211189, Peoples R China
[3] Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 24期
基金：
中国国家自然科学基金;
关键词：
chromium; ferroelectric transitions; ferroelectricity; holmium compounds; multiferroics;
D O I：
10.1063/1.3455100
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A series of polycrystalline pyrochlore rare-earth titanate Ho2-xCrxTi2O7 are synthesized in order to enhance the ferroelectricity of pyrochlore Ho2Ti2O7. A giant enhancement of polarization P from 0.54 mu C/m(2) at x=0 up to similar to 660 mu C/m(2) at x=0.4 is obtained, accompanied with an increment of ferroelectric transition point T-c from T-c similar to 60 K up to T-c similar to 140 K. A magnetic anomaly at T-c similar to 140 K together with the polarization response to magnetic field is identified, implying the multiferroic effect in Ho2-xCrxTi2O7. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3455100]
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页数：3
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