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Magnetodielectric effect in EuZrO3
被引:35
作者:
Kolodiazhnyi, T.
[1
]
Fujita, K.
[2
]
Wang, L.
[3
,4
]
Zong, Y.
[2
]
Tanaka, K.
[2
]
Sakka, Y.
[3
,4
]
Takayama-Muromachi, E.
[1
]
机构:
[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan
[2] Kyoto Univ, Grad Sch Engn, Dept Chem Mat, Nishikyo Ku, Kyoto 6158510, Japan
[3] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan
[4] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
关键词:
antiferromagnetic materials;
bonds (chemical);
ceramics;
europium compounds;
magnetoelectric effects;
permittivity;
superexchange interactions;
EUTIO3;
D O I:
10.1063/1.3456730
中图分类号:
O59 [应用物理学];
学科分类号:
摘要:
Following recent report on antiferromagnetic ordering in EuZrO3 we performed dielectric measurements of this material as a function of temperature and magnetic field. Dielectric constant of dense EuZrO3 ceramics is 30.1 at 300 K. It gradually decreases upon cooling without any quantum paraelectric behavior; however, below T-N=4.1 K it shows a pronounced drop that qualitatively resembles that observed in EuTiO3. We report that dielectric constant of EuZrO3 is magnetic field dependent. The magnitude of the magnetodielectric effect in both EuTiO3 and EuZrO3 is discussed in the light of the recently proposed coupling of the Eu-O-Eu superexchange interactions with electrons involved in partially covalent Ti(Zr)-O bond. (C) 2010 American Institute of Physics. [doi:10.1063/1.3456730]
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