Experimental and Theoretical Investigations of Magnetic Properties of Co Ferrite/Polyvinyl Alcohol Nanocomposites

Journal Article · Mon Jan 15 00:00:00 EST 2018 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-017-4166-6· OSTI ID:22774169

Mirzaee, S., E-mail: [e-mail] ^[1]; Mahdavifar, S., E-mail: [e-mail]; Shayesteh, S. Farjami, E-mail: [e-mail] ^[2]

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1. University of Mohaghegh Ardabili, Department of Engineering Science, Faculty of Advanced Technologies (Iran, Islamic Republic of)
2. University of Guilan, Nanostructure Lab, Department of Physics (Iran, Islamic Republic of)

Cobalt ferrite nanoparticles (NPs) have been synthesized by the modified co-precipitation technique in the presence of the polyvinyl alcohol (PVA) matrix. The structural and magnetic properties of NPs are tunable by means of interaction between the polymer and the surface of NPs. Magnetic properties of NPs were simulated using the accurate Monte Carlo (MC) method. In addition, the magnetic anisotropy constant has been obtained by means of the law of approach to saturation magnetization (LAS). The experimental and theoretical results are in good agreement with each other and show that the as-synthesized NPs are single domain and approximately non-interacting. The anisotropy constant and size of the NPs increase by increasing the concentration of precursors in the reaction medium. Nanocomposites have been characterized by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Hysteresis loops were investigated at room temperature using a vibrating sample magnetometer (VSM). The crystallite size of single-domain NPs is lower than 20 nm, and the obtained results from FT-IR confirmed the interaction between PVA and the surface of the particles. These approximately non-interacting NPs are useful for magnetic data storage.

• OSTI ID: 22774169
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 31, Issue 1; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; Article Copyright (c) 2017 Springer Science+Business Media New York; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
ANISOTROPY
COBALT COMPOUNDS
COERCIVE FORCE
COPRECIPITATION
FERRITES
FOURIER TRANSFORM SPECTROMETERS
HYSTERESIS
MAGNETIC PROPERTIES
MAGNETIZATION
MATRIX MATERIALS
MEMORY DEVICES
MONTE CARLO METHOD
NANOCOMPOSITES
NANOPARTICLES
PVA
SURFACES
TEMPERATURE RANGE 0273-0400 K
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION