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

Journal Article · Tue Apr 28 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4918663· OSTI ID:22402925

Bala, Kanchan ^[1]; Yadav, Akash; Kotnala, R. K. ^[2]

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1. Department of Physics, Himachal Pradesh University, Shimla 171005 (India)
2. CSIR-National Physical Laboratory, Dr. K.S. Krishnan Road, New Delhi 110012 (India)

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.

• OSTI ID: 22402925
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 16; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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