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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.
Pawar, S.A.,Patil, D.S.,Patil, S.K.,Awale, D.V.,Devan, R.S.,Ma, Y.R.,Kolekar, S.S.,Kim, J.H.,Patil, P.S. Pergamon Press 2014 ELECTROCHIMICA ACTA Vol.148 No.-
A thiocyanate functionalized ionic liquid based electrolyte is developed for the application in CdSe thin film solar cell. An aqueous solvent consisting of polysulfide and thiocyanate functionalized IL has been found as the optimum solvent for preparing the liquid electrolytes. This solvent ratio appears to give higher cell efficiency compared to pure aqueous polysulfide electrolyte. Polysulfide and thiocyanate functionalized IL give rise to a good redox couple in the electrolyte for photoelectrochemical performance. The CdSe photoanode used for solar cell study has been synthesized by a simple and cost-effective one-step, one-pot chemical bath deposition method onto the F: SnO<SUB>2</SUB> substrates. The as-deposited films were annealed at temperatures 100, 200, 300 and 400<SUP>o</SUP>C, respectively for 1h in ambient air. The maximum current density of 3.55mA/cm<SUP>2</SUP> for the sample annealed at 300<SUP>o</SUP>C is observed in the polysulfide electrolyte with the power conversion efficiency 0.76%. Addition of thiocyanate functionalized IL in polysulfide produced the highest current density of 4.93mA/cm<SUP>2</SUP> with the two fold increase in the power conversion efficiency up to 1.32%.