Magnetoelectric and magnetodielectric properties of (1−x)Ba0.6Sr0.4TiO3–(x)La0.7Ca0.3MnO3 composites

Autor:	Namjung Hur, K.M. Song, T. Bonaedy, Jong Hoon Jung, K.D. Sung
Rok vydání:	2008
Předmět:	Permittivity Materials science Magnetoresistance Condensed matter physics Magnetoelectric effect General Chemistry Dielectric Condensed Matter Physics Manganite Ferroelectricity Ferromagnetism Materials Chemistry Curie temperature Composite material
Zdroj:	Solid State Communications. 148:424-427
ISSN:	0038-1098
DOI:	10.1016/j.ssc.2008.09.025
Popis:	We have investigated the magnetoelectric and magnetodielectric properties of (1−x)Ba0.6Sr0.4TiO3–(x)La0.7Ca0.3MnO3 composites, where constituent Ba0.6Sr0.4TiO3 and La0.7Ca0.3MnO3 have nearly the same ferroelectric ( T C E ∼ 270 K ) and ferromagnetic ( T C M ∼ 275 K ) Curie temperatures. Below a percolation-limit sample, i.e., x = 0.05 , we have observed a decrease of electrical polarization and an increase of dielectric constant with strong frequency dependences near T C M when we turn on the magnet. On the other hand, we have observed little change of electrical polarization and a decrease of dielectric constant without frequency dependences at 10 K. We have attributed the observed magnetoelectric and magnetodielectric properties to the extrinsic magnetoresistance origin near T C M and to the strain-induced magnetoelectric coupling at 10 K.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::71e13023820bba0750f4c263e77b0a67 https://doi.org/10.1016/j.ssc.2008.09.025 Zobrazit plný text záznamu Full Text from ScienceDirect