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Ferroelectrics Volume 409, 2010 - Issue 1
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SECTION K: MULTIFERROICS AND APPLICATIONS

Large Magnetodielectric Effect in (1-X) La2NiMnO6—(X) La2/3Sr1/3MnO3 Composites

Y. Hou Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei, 230026, China
,
Q. X. Yu Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei, 230026, China
,
Y. P. Yao Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei, 230026, China
,
X. H. Huang Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei, 230026, China
,
S. N. Dong Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei, 230026, China
,
Y. Chen Institute of Nuclear Technology, Shenzhen University, Shenzhen, 518060, China
&
X. G. Li Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei, 230026, China; International Center for Materials Physics, Academia Sinica, Shenyang, 110015, China
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Pages 196-203 | Received 23 Aug 2009, Accepted 09 Oct 2009, Published online: 01 Dec 2010
 
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Abstract

A large magnetodielectric effect in (1-x) La2NiMnO6—(x) La2/3Sr1/3MnO3 composites over wide frequency and temperature ranges is reported. The results indicate that variation of dielectric constants with magnetic fields depends non-monotonously on the molar ratio of two compounds and reaches a maximum up to 20% for x = 0.4 at the frequency of 1 MHz and field of 1 kOe at room temperature. The further analyses suggest that this effect is closely related to the magnetoresistance. These findings provide an alternative strategy to achieve a room temperature magnetodielectric response in multiferroic composites, indicating that it is promising for potential applications.

Acknowledgments

This work is supported by the National Natural Science Foundation of China and the National Basic Research Program of China (Contract Nos. 2006CB922005 and 2009CB929502).

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