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IJPAP Vol.48(02) [February 2010] >


Title: Characterisation and magnetic properties of nanocrystalline FePO
Authors: Thomas, Marykutty
George, K C
Keywords: Nanocrystalline FePO4
Reactant concentration
IR spectrum
ESR
Magnetic susceptibility
Neel temperature
Issue Date: Feb-2010
Publisher: CSIR
Abstract: Nanocrystalline FePO4 prepared by chemical method has been characterized using TG/DTA, XRD, TEM and FTIR. Magnetic studies have been carried out using VSM, SQUID magnetometry and ESR measurements. The FePO4 for three reactant concentrations (1ML-1, 0.1ML-1, 0.02M L-1) has been prepared and the effect of reactant concentration on particle size and hence, on magnetic properties is studied. Magnetic susceptibility and ESR measurements support each other and FePO4 is found to be an anisotropic antiferromagnet with a Neel temperature of 21 K. As particle size decreases, the magnetic moment at room temperature decreases indicating magnetic moment disorder on the surface of smaller particles.
Page(s): 104-109
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.48(02) [February 2010]

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