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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14080
Title: Magnetocaloric effects from an interplay of magnetic sublattices in Nd2NiMnO6
Authors: Ali A.
Sharma G.
Vardhan A.
Pasrija K.
Rajput S.
Maitra, Tulika
Kumar S.
Singh Y.
Published in: Journal of Physics Condensed Matter
Abstract: We present a combined experimental and theoretical study to understand the magnetism and magnetocaloric behavior of the double perovskite Nd2NiMnO6. The magnetic susceptibility data confirms a ferromagnetic transition with K. An additional feature at T = 25 K, indicative of antiferromagnetic correlations, is present. A positive magnetocaloric effect (MCE) near and a negative MCE around T = 25 K is inferred from the temperature dependence of the change in magnetic entropy at low magnetic fields. The negative MCE peak is suppressed on the application of a magnetic field and can be made to switch to a conventional positive MCE upon increasing magnetic field. We understand and reproduce these features in Monte Carlo simulations of a phenomenological Heisenberg model for Nd2NiMnO6. The validity of the model is tested using density functional theory calculations. We argue that this simple understanding of the experimental observations in terms of two antiferromagnetically coupled sublattices allows these results to be useful across a broader class of magnetocaloric materials. © 2019 IOP Publishing Ltd.
Citation: Journal of Physics Condensed Matter (2019), 31(30): -
URI: https://doi.org/10.1088/1361-648X/ab151a
http://repository.iitr.ac.in/handle/123456789/14080
Issue Date: 2019
Publisher: Institute of Physics Publishing
Keywords: density functional theory
double perovskites
magnetocaloric effect
Monte Carlo simulations
ISSN: 9538984
Author Scopus IDs: 57199422105
56160296900
57052969200
55916206900
57208213686
7004183343
57210606594
7203076473
Author Affiliations: Ali, A., Indian Institute of Science Education and Research Mohali, Sector 81, S.A.S. Nagar, Manauli, PO 140306, India
Sharma, G., Indian Institute of Science Education and Research Mohali, Sector 81, S.A.S. Nagar, Manauli, PO 140306, India
Vardhan, A., Indian Institute of Science Education and Research Mohali, Sector 81, S.A.S. Nagar, Manauli, PO 140306, India
Pasrija, K., Indian Institute of Science Education and Research Mohali, Sector 81, S.A.S. Nagar, Manauli, PO 140306, India
Rajput, S., Indian Institute of Technology, Roorkee, Roorkee Uttarakhand, 247667, India
Maitra, T., Indian Institute of Technology, Roorkee, Roorkee Uttarakhand, 247667, India
Kumar, S., Indian Institute of Science Education and Research Mohali, Sector 81, S.A.S. Nagar, Manauli, PO 140306, India
Singh, Y., Indian Institute of Science Education and Research Mohali, Sector 81, S.A.S. Nagar, Manauli, PO 140306, India
Corresponding Author: Kumar, S.; Indian Institute of Science Education and Research Mohali, Sector 81, S.A.S. Nagar, India; email: sanjeev@iisermohali.ac.in
Appears in Collections:Journal Publications [PH]

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