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Title: Multiferroic and magnetoelectric properties of CoFe{sub 2}O{sub 4}/Pb{sub 1−x}Sr{sub x}TiO{sub 3} composite films

To realize multiferroic and magnetoelectric properties, bi-layered nanocomposite films consisting of CoFe{sub 2}O{sub 4} (CFO)/Pb{sub 1−x}Sr{sub x}TiO{sub 3} (PST) phases (x = 0.1, 0.2, and 0.3) have been deposited on Pt/TiO{sub 2}/SiO{sub 2}/Si substrate by using a metallo-organic decomposition process. Both the PST perovskite and the CFO spinel phases are confirmed from X-ray diffraction patterns and Raman spectra of the composite films. The composite films exhibit room temperature multiferroic properties. The values of saturation magnetization (M{sub s}), remanent magnetization (M{sub r}), and coercive field (H{sub c}) of the composite films are in the range of 108–119 kA/m, 42–51 kA/m, and 44.5–64.1 kA/m, respectively. In addition, the saturation polarization (P{sub s}), remanent polarization (P{sub r}), and electrical coercive field (E{sub c}) are observed in the range of 11.3–14.4 μC/cm{sup 2}, 2.9–4.8 μC/cm{sup 2}, and 56–59.5 kV/cm, respectively. The dielectric response in the presence of applied magnetic field, H{sub dc} ∼ 238.6 kA/m shows a high magnetocapacitance value ∼385% at frequency 100 kHz for CFO/PST composite film with x = 0.1. The maximum magnetoelectric voltage co-efficient value, α{sub E} ∼ 380 kV/(m × T) has been achieved in the composite films with x = 0.1. The influence of elastic/and or interfacial strain on multiferroic magnetoelectric properties is evident from the results.
Authors:
;  [1] ; ;  [2]
  1. Department of Physics, Himachal Pradesh University, Shimla 171005 (India)
  2. CSIR-National Physical Laboratory, Dr. K.S. Krishnan Road, New Delhi 110012 (India)
Publication Date:
OSTI Identifier:
22402925
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 16; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COBALT OXIDES; DIELECTRIC MATERIALS; ELECTRICAL PROPERTIES; IRON OXIDES; KHZ RANGE; LEAD COMPOUNDS; MAGNETIC FIELDS; MAGNETIC PROPERTIES; MAGNETIZATION; PEROVSKITE; POLARIZATION; RAMAN SPECTRA; SILICON OXIDES; SPINELS; STRONTIUM TITANATES; TEMPERATURE RANGE 0273-0400 K; THIN FILMS; TITANIUM OXIDES; X-RAY DIFFRACTION