Magnetocapacitance and impedance spectroscopy of Ba0.7Sr0.3TiO3/La0.67Sr0.33MnO3 and Ba0.8Sr0.2TiO3/La0.67Sr0.33MnO3 thin film heterostructures

• Published in: Journal of sol-gel science and technology 2014-06, Vol.70 (3), p.346-354
• Main Authors: Tarale, A. N., Joshi, P. B., Kulkarni, S. B., Reddy, V. R., Gupta, M., Pawar, R. C., Lee, C. S.
• Format: Article
• Language: English
• Subjects: Ceramics; Chemistry; Chemistry and Materials Science; Colloidal gels. Colloidal sols; Colloidal state and disperse state; Composites; Exact sciences and technology; General and physical chemistry; Glass; Heterostructures; Inorganic Chemistry; Magnetoimpedance; Magnetoresistance; Magnetoresistivity; Materials Science; Nanotechnology; Natural Materials; Optical and Electronic Materials; Original Paper; Permittivity; Sol-gel processes; Spectrum analysis; Thin films
• ISSN: 0928-0707; 1573-4846
• DOI: 10.1007/s10971-014-3288-6

The paper discuses synthesis of Ba 0.7 Sr 0.3 TiO 3 /La 0.67 Sr 0.33 MnO 3 and Ba 0.8 Sr 0.2 TiO 3 /La 0.67 Sr 0.33 MnO 3 thin film heterostructures by sol–gel (citrate gel route) method. The XRD spectra are determined for confirmation of crystalline phases of Ba 0.7 Sr 0.3 TiO 3 , Ba 0.8 Sr 0.2 TiO 3 and La 0.67 Sr 0.33 MnO 3 thin films. The observed variation of Cp, tan δ, magnetocapacitance (Mc), real part of dielectric constant ε′, imaginary part of dielectric constant ε″as a function of frequency, magnetoresistance R(H) and magnetoimpedance Z(H) are presented in the paper. Further the observed impedance spectra as a function of frequency f is also presented in the paper. The observed variation of Mc is qualitatively correlated with the stress induced effect and magnetoresistasnce effect occurring simultaneously.