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Magnetodielectric Properties of La0.67Sr0.33MnO3 and Ba0.7Sr0.3TiO3 Thin Film Heterostructures
Arjun Tarale,Y.D. Kolekar,V.L. Mathe,S.B. Kulkarni,V.R. Reddy,Pradeep Joshi 대한금속·재료학회 2012 ELECTRONIC MATERIALS LETTERS Vol.8 No.4
The paper discuses synthesis and magnetodielectric properties of La0.67Sr0.33MnO3 (LSMO), Ba0.7Sr0.3TiO3 (BST),and BST/LSMO thin film heterostructures. The XRD spectra are determined for confirmation of the crystal structure of LSMO, BST and formation of a pure bi-phase composite. The paper presents variation of Cp and tanδ as a function of frequency between 100 Hz to 1 MHz and applied magnetic field up to 0.6 T. The observed variation of Cp, tanδ, magnetocapacitance and impedance spectra are analyzed in terms of a possible equivalent circuit model. The present analysis shows that the method of impedance spectra could be used to separate out the possible contributions.