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篇目详细内容 |
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【篇名】 |
Experimental observations of ferroelectricity in double pyrochlore Dy2Ru2O7 |
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【刊名】 |
Frontiers of Physics |
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【刊名缩写】 |
Front. Phys |
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【ISSN】 |
2095-0462 |
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【EISSN】 |
2095-0470 |
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【DOI】 |
10.1007/s11467-013-0395-8 |
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【出版社】 |
Higher Education Press and Springer-Verlag Berlin
Heidelberg |
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【出版年】 |
2014 |
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【卷期】 |
9
卷1期 |
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【页码】 |
82-89
页,共
8
页 |
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【作者】 |
Zai-;
Chun Xu;
Mei-;
Feng Liu;
Lin Lin;
Huimei Liu;
Zhi-;
Bo Yan;
Jun-;
Ming Liu;
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【关键词】 |
pyrochlore oxides; multiferroics; magnetically induced ferroelectricity |
【摘要】 |
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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. |
