Temperature and electric field response of a dielectric (Ba,Sr)TiO 3 layer between perovskite‐type manganite electrodes

Epitaxial films of ferroelectric (00l)Ba 0.25 Sr 0.75 TiO 3 (BSTO) and ferromagnetic half metal La 0.67 Sr 0.33 MnO 3 were grown by laser ablation, forming a trilayer heterostructure with combined ferroelectric and magnetic properties, on (001)(LaAlO 4 ) 0.3 + (Sr 2 AlTaO 6 ) 0.7 substrates. Maxima...

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Bibliographic Details
Published in:Annalen der Physik 2004-01, Vol.516 (1-2), p.103-105
Main Authors: Khamchane, K., Boikov, Yu.A., Ivanov, Z.G.
Format: Article
Language:English
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Summary:Epitaxial films of ferroelectric (00l)Ba 0.25 Sr 0.75 TiO 3 (BSTO) and ferromagnetic half metal La 0.67 Sr 0.33 MnO 3 were grown by laser ablation, forming a trilayer heterostructure with combined ferroelectric and magnetic properties, on (001)(LaAlO 4 ) 0.3 + (Sr 2 AlTaO 6 ) 0.7 substrates. Maxima T M in the dielectric permittivity of ϵ of the BSTO film were 30–50 K lower than in bulk and ϵ follows a Curie‐Weiss law above T M . The ϵ was suppressed up to 50% at ±2.5 V between the electrodes. Below 100 K, loss function tan δ was found to be 0.005–0.01 at 1 kHz and 100 kHz.
ISSN:0003-3804
1521-3889
DOI:10.1002/andp.200451601-234