Gd induced modifications in the magnetocaloric properties of dysprosium manganites

JOURNAL OF ALLOYS AND COMPOUNDS

卷:883

Article

Prusty, Abinash^1,2  Mahana, Sudipta³  Gloskovskii, Andrei⁴  Topwal, D.^5,6  Manju, U.^1,2 

[1] CSIR, Inst Minerals & Mat Technol, Bhubaneswar 751013, India

[2] Acad Sci & Innovat Res AcSIR, Ghaziabad 201002, India

[3] Rajdhani Coll, Bhubaneswar 751003, India

[4] DESY Photon Sci, Deutsch Elektronen Synchrotron, D-22603 Hamburg, Germany

[5] Inst Phys, Sachivalaya Marg, Bhubaneswar 751005, India

[6] Homi Bhabha Natl Inst, Training Sch Complex, Mumbai 400094, Maharashtra, India

关键词: Mixed rare-earth oxides;    Magnetization;    Heat capacity;    Magnetic entropy;    Adiabatic temperature;    Magnetocaloric effect;   

DOI  :  10.1016/j.jallcom.2021.160862

来源: Elsevier

【 摘 要 】

We report structural, electronic, magnetic, and magnetocaloric studies of polycrystalline DyMnO3 and its A-site Gd substituents, Dy1-xGdxMnO3, where 0 <= x <= 1. Detailed comparison of various magnetocaloric parameters shows that Dy0.5Gd0.5MnO3 has the best values with a large isothermal magnetic entropy change. -Delta S-m(max) similar to 15.35 J/kg K, adiabatic temperature change, Delta T-ad(max) similar to 6.15 K and relative cooling power, RCP similar to 307 J/kg, suggesting that rare earth mixing plays a vital role in enhancing the magnetocaloric properties. In addition, absence of magnetic and thermal hysteresis also makes it one of the best candidates for magnetic refrigeration among all known potential candidates for cryogenic temperature applications. (C) 2021 Elsevier B.V. All rights reserved.

【 授权许可】

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