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Title: Characterisation and magnetic properties of nanocrystalline FePO<sub>4­</sub>
Authors: Thomas, Marykutty
George, K C
Keywords: Nanocrystalline FePO<sub>4</sub>
Reactant concentration
IR spectrum
Magnetic susceptibility
Neel temperature
Issue Date: Feb-2010
Publisher: CSIR
Abstract: Nanocrystalline FePO<sub>4</sub> 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 FePO<sub>4 </sub>for three reactant concentrations (1ML<sup>-1</sup>, 0.1ML<sup>-1</sup>, 0.02M L<sup>-1</sup>) 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 FePO<sub>4</sub> 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.
Description: 104-109
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.48(02) [February 2010]

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