Magnetoelectric behavior of BaTiO3 films directly grown on CoFe 2O4 ceramics

Journal of Applied Physics

Volumn 104, Issue 1, 2008, Pages

  Wang, Jing ^a   Zhang, Yi ^a   Ma, Jing ^a   Lin, Yuanhua ^a   Nan, C W ^a  

^a TSINGHUA UNIVERSITY   (China)

Author keywords

[No Author keywords available]

Indexed keywords

BARIUM TITANATE;

EID: 47749084277     PISSN: 00218979     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.2949256     Document Type: Article

References (15)

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12. There are two different characteristic modes for magnetic-electric effects. The first is an active mode, such as the magnetoresistive (MR) and magnetodielectric (MD) effect. In the MR effect, it requires a constant dc test current I passing through the samples to obtain a voltage amplitude change induced by a magnetic field. In the MD effect, it requires an ac test current passing through the samples to obtain capacitive signal change induced by a magnetic field (or a dc pulse test voltage on the sample to obtain polarization signal change induced by a magnetic field in the P-E loop measurement). Thus when making ME measurement on multiferroic samples in the active mode (i.e., direct measurement of the P-E loop or dielectric constant change under the applied magnetic field), we have to consider the contribution from the MR and interfacial capacitive effects (or Maxwell-Wagner interfacial polarization effect). In the present ME measurement, which is the passive mode, there is no dc and ac test currents (or dc test voltage) through the samples, and an induced ME voltage by the magnetic field is directly read. Meanwhile, the MR effect in the present case is very small (about 0.2% at room temperature) and the convincing MD effect is even not measurable. Thus the very slight MR and MD effects appearing in the active mode would not make a contribution to the ME output signals (Fig.) measured in this passive mode.
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