A simple method for direct observation of the converse magnetoelectric effect in magnetic/ferroelectric composite thin films

Li, Zheng; Hu, Jiamian; Shu, Li; Zhang, Yi; Gao, Ya; Shen, Yang; Lin, Yuanhua; Nan, C. W.

doi:doi:10.1063/1.3660694

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Journal of Applied Physics / Volume 110 / Issue 9 / COMMUNICATIONS

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J. Appl. Phys. 110, 096106 (2011); http://dx.doi.org/10.1063/1.3660694 (3 pages)

A simple method for direct observation of the converse magnetoelectric effect in magnetic/ferroelectric composite thin films

Zheng Li, Jiamian Hu, Li Shu, Yi Zhang, Ya Gao, Yang Shen, Yuanhua Lin, and C. W. Nan

Department of Materials Science and Engineering, and State Key Lab of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China

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(Received 26 August 2011; accepted 12 October 2011; published online 14 November 2011)

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Abstract

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A novel characterization method is presented to directly observe the pure converse magnetoelectric (ME) effect, i.e., the electric-field modification of magnetization, in composite magnetic/ferroelectric (FE) layered thin films. A low-frequency AC electric-voltage, rather than DC voltage bias, is applied to the FE thin films to minimize the leakage current, whereby the possible side effect of heating can be avoided. In particular, by synchronizing the frequency of the Kerr signal detector to the AC actuation voltage bias, the voltage-induced change of the magnetization in the magnetic films can be in situ recorded even under zero external magnetic fields. For illustration, this method is applied to two similar magnetic/FE composite thin films, with significant strain-mediated converse ME coupling being demonstrated in both cases.

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KEYWORDS and PACS

Keywords

composite materials, ferroelectric materials, leakage currents, magnetic thin films, magnetisation, magnetoelectric effects

PACS

75.85.+t

Magnetoelectric effects, multiferroics
77.55.Nv

Multiferroic/magnetoelectric films
75.60.Ej

Magnetization curves, hysteresis, Barkhausen and related effects
75.78.-n

Magnetization dynamics
75.70.-i

Magnetic properties of thin films, surfaces, and interfaces
77.80.-e

Ferroelectricity and antiferroelectricity

ARTICLE DATA

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http://dx.doi.org/10.1063/1.3660694

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0021-8979 (print)

1089-7550 (online)

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$abstract.society.value is a Member of CrossRef

American Institute of Physics

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J. Appl. Phys. 107, 093912 (2010)JAPIAU000107000009093912000001

Appl. Phys. Lett. 98, 222509 (2011)APPLAB000098000022222509000001

J. Appl. Phys. 107, 083901 (2010)JAPIAU000107000008083901000001

Appl. Phys. Lett. 98, 012504 (2011)APPLAB000098000001012504000001

J. Appl. Phys. 109, 066101 (2011)JAPIAU000109000006066101000001

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