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Magnetocapacitance Properties of Multilayered CoFe₂O₄/BaTiO₃/CoFe₂O₄ Thin Film by Pulsed Laser Deposition

Journal of Magnetics, Volume 19, Number 2, 30 Jun 2014, Pages 121-125

Seong Noh Lee (Department of Physics, Kookmin University), Hyun Ju Shim (Hankuk Academy of Foreign Studies), In-Bo Shim *

(Department of Physics, Kookmin University)

Abstract

CoFe₂O₄(CFO)/BaTiO₃(BTO)/CoFe₂O₄(CFO) multilayered thin films were deposited on Pt/TiO₂/SiO₂/Si substrates by the pulsed laser deposition (PLD) system with KrF excimer laser (λ = 248 nm). BTO, CFO, BTO/CFO and CFO/BTO/CFO structured thin films were prepared and their crystal structures and microstructures, as well as their magnetic and magneto-electrical properties, were studied. The C-V characteristics of these multilayered thin films with different capacitor structures were obtained to confirm the change in their capacitances under a magnetic field. Finally, the capacitance of the CFO/BTO/CFO thin film as a function of bias voltage under an in-plane magnetic field of 1,000 Oe increased to 951.04 pF at 1 MHz, from 831.90 pF measured under no magnetic field, indicating 14.3% increase in magnetocapacitance.

Keywords: magnetostriction; magnetocapacitance; pulsed laser deposition

DOI: http://dx.doi.org/10.4283/JMAG.2014.19.2.121

Full Text: PDF

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