Magnetic anisotropy and magnetocaloric effect in Gd2NiMnO6 thin films

Ghosh, A and Roy, R and Sahoo, RC and Sarangi, SN and Ghosh, M and Mazumdar, D and Samal, D and Kumar, PSA and Hossain, Z and Kanungo, S and Sow, C (2023) Magnetic anisotropy and magnetocaloric effect in Gd2NiMnO6 thin films. In: Physical Review B, 108 (21).

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Abstract

The magnetism and magnetocaloric effect in double perovskites is an alluring area of research due to its tunable nature. In particular, the exchange interactions and local ordering of magnetic sublattices are sensitive to the chemical substitution, synthesis/growth conditions, and strain. Here we study the effect of strain on magnetism in Gd2NiMnO6 double perovskite thin films grown using pulsed laser deposition on SrTiO3 (001) substrate. Magnetostructural study finds tensile strain to be the origin of perpendicular magnetic anisotropy in Gd2NiMnO6. Further, the anisotropic nature prevails in magnetocaloric effect as well. Magnetic entropy change along the in-plane direction is observed to be 21.82 J Kg-1K-1, which reduces to 9.84 J Kg-1K-1 along the out-of-plane direction. Our theoretical calculation reveals a ferrimagnetic ground state of Gd2NiMnO6. The relative spin orientation of Ni and Mn changes from parallel configuration for strained Gd2NiMnO6 to antiparallel configuration for strain-relaxed Gd2NiMnO6. © 2023 American Physical Society.

Item Type:	Journal Article
Publication:	Physical Review B
Publisher:	American Physical Society
Additional Information:	The copyright for this article belongs to American Physical Society.
Keywords:	Ground state; Magnetic anisotropy; Magnetocaloric effects; Manganese compounds; Nickel compounds; Perovskite; Perovskite solar cells; Pulsed laser deposition; Strontium titanates; Tensile strain; Thin films, Chemical substitution; Double perovskites; Effects of strains; Growth conditions; Growth strain; Local order; Magnetic sublattices; Perovskite thin films; Thin-films; Tunables, Gadolinium compounds
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for High Energy Physics Division of Physical & Mathematical Sciences > Physics
Date Deposited:	01 Mar 2024 09:57
Last Modified:	01 Mar 2024 09:57
URI:	https://eprints.iisc.ac.in/id/eprint/84023

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