Effect of nanoscale size reduction on the magnetic properties of Pr0.6Sr0.4MnO3

Souza, Anita D and Vagadia, Megha and Daivajna, Mamatha D (2021) Effect of nanoscale size reduction on the magnetic properties of Pr0.6Sr0.4MnO3. Journal of magnetism and Magnetic materials, 538. ISSN 0304-8853

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Abstract

The ferromagnetic Pr0.6Sr0.4MnO3 sample has been subjected to time bound high energy planetary ball milling with an aim to reduce the particle size. When the particle size is analyzed as a function of milling time, it is found that particle size decreases with increasing milling time and then saturates at a certain value. The implications of the decrease in particle size on magnetic properties have been carefully studied by analyzing the magnetization data in detail. With a decrease in particle size, the Curie temperature, TC and the magnitude of magnetization drops. A deviation in inverse magnetic susceptibility from the Curie-Weiss behaviour has been noticed for nanoparticles which suggest the presence of quenched disorder due to particle size reduction. The strength of magnetic interactions switches from long range to short range with a systematic decrease in particle size. The observed properties can be explained considering the core–shell structure of the nanoparticle where the surface defects strongly influence the degree of disorder in the system.

Item Type: Article
Uncontrolled Keywords: Manganites Griffith’s phase Nanoparticles Magnetic properties
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 23 Jun 2022 04:15
Last Modified: 23 Jun 2022 04:15
URI: http://eprints.manipal.edu/id/eprint/158722

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