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Size Dependent Magnetic Properties of Nd0.7Ca0.3MnO3 Nanomanganite

Anuradha, KN and Koushalya, PR and Bhat, SV (2015) Size Dependent Magnetic Properties of Nd0.7Ca0.3MnO3 Nanomanganite. In: International Conference on Materials Science and Technology (ICMST), JUN 10-14, 2012, Kerala, INDIA.

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Official URL: http://dx.doi.org 10.1088/1757-899X/73/1/012007

Abstract

Nanoscale materials show different properties compared to bulk materials. Due to the size dependent properties the nanoscale materials have potential applications in industry. In this paper the size dependent magnetic properties of Nd0.7Ca0.3MnO3 nanomanganite have been investigated. Nd0.7Ca0.3MnO3 nanoparticles were prepared by low temperature sol-gel method. X-ray diffraction (XRD), Transmission Electron Microscopy (TEM) and EDAX techniques were used to understand the structure, grain size and composition. Nanoparticles prepared were of the sizes 15 nm, 19 nm and 25 nm respectively. SQUID magnetometer was used to study the magnetic behavior of the nanoparticles. Field cooled (FC) and zero field cooled (ZFC) magnetization of all the nanosamples with respect to temperature was studied and compared. We have observed drastic changes in magnetic properties of 15 nm particles compared to the other nanoparticles. The `charge order peak' was seen to have disappeared in 15 nm particles while it was present in the other nanoparticles. All the nano particles exhibit superparamagnetism whose blocking temperature decreases as a function of decreasing particle size. The possible reasons for the influence of the particle size on the magnetic properties are discussed.

Item Type: Conference Proceedings
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Additional Information: International Conference on Materials Science and Technology (ICMST), Kerala, INDIA, JUN 10-14, 2012
Keywords: PR0.57CA0.41BA0.02MNO3; MAGNETORESISTANCE
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 13 May 2015 07:29
Last Modified: 13 May 2015 07:29
URI: http://eprints.iisc.ernet.in/id/eprint/51535

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