Vats, Gaurav and -, Ravikant and Kumari, Shalini and Pradhan, Dhiren K. and Katiyar, Ram S. and Ojha, V. N. and Bowen, Chris R. and Kumar, Ashok (2019) Magnetocaloric effect and piezoresponse of engineered ferroelectric-ferromagnetic heterostructures. Journal of Magnetism and Magnetic Materials, 473. pp. 511-516. ISSN 0304-8853

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This study reports the magnetocaloric effect (MCE) and piezoresponse of integrated ferroelectric-ferromagnetic heterostructures of PbZr0.52Ti0.48O3 (PZT) (5 nm)/Bi-Sr-Ca-Cu-2-O-x (BSCCO) (5 nm)/La0.67Sr0.33MnO3 (LSMO) (40 nm)/MgO (0 01). Magnetic and pizoresponse behavior of the heterostructures are found to be governed by magneto-electric coupling and induced lattice strains. In addition, a maximum MCE is studied using Maxwell equations from both Field Cooled (FC) and Zero Field Cooled (ZFC) magnetization data. Maximum MCE entropy change (vertical bar Delta s vertical bar) of 42.6 mJkg(-1)K(-1) (at 258 K) and 41.7 mJkg(-1)K(-1) (at 269 K) are found corresponding to FC and ZFC data, respectively. The variation in maximum entropy change and corresponding temperatures for FC and ZFC data revealed that the application of a magnetic field can significantly contribute towards tuning of the MCE. Interestingly, these multilayered structures are found to sustain MCE over a broad temperature range, which makes them attractive for improved solid-state energy conversion devices.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Elsevier.
Subjects: Materials Science
Applied Physics/Condensed Matter
Depositing User: Mr. Yogesh Joshi
Date Deposited: 31 Dec 2020 11:43
Last Modified: 31 Dec 2020 11:43

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