Experimental observations of ferroelectricity in double pyrochlore Dy2Ru2O7

doi:10.1007/s11467-013-0395-8

Front. Phys.

2014, Vol. 9

Issue (1) : 82-89 https://doi.org/10.1007/s11467-013-0395-8

Experimental observations of ferroelectricity in double pyrochlore Dy₂Ru₂O₇

Zai-Chun Xu, Mei-Feng Liu, Lin Lin, Huimei Liu, Zhi-Bo Yan, Jun-Ming Liu(

)

Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China

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Abstract

Double pyrochlore Dy2Ru2O7 is synthesized and its magnetism and ferroelectricity below the Ru⁴⁺ spin ordering temperature (～100 K) are investigated. The ferroelectric transition appears at ～18 K, much higher than the Dy³⁺ spin ordering point at ～1.8 K and lower than the Ru⁴⁺ spin ordering point at ～100 K. The measured electric polarization at ～2 K is as big as 145 μC/m² in the polycrystalline samples. It is argued that the ferroelectricity is possibly ascribed to the electric dipole ordering arising from the collective monopole excitations in the Dy³⁺ tetrahedrons in prior to the Dy³⁺ spin ordering into spin-ice like state below ～1.8 K.

Keywords pyrochlore oxides multiferroics magnetically induced ferroelectricity

Corresponding Author(s): Liu Jun-Ming,Email:liujm@nju.edu.cn

Issue Date: 01 February 2014

Cite this article:

Zhi-Bo Yan,Jun-Ming Liu,Zai-Chun Xu, et al. Experimental observations of ferroelectricity in double pyrochlore Dy₂Ru₂O₇[J]. Front. Phys. , 2014, 9(1): 82-89.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-013-0395-8
https://academic.hep.com.cn/fop/EN/Y2014/V9/I1/82

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