Work

Magnetism and magnetocaloric effect of multicomponent rare earth intermetallic hydride Gd0.2Tb0.2Dy0.2Ho0.2Er0.2NiH1.4

Year: 2025

Type: article

Abstract: Multicomponent Gd0.2Tb0.2Dy0.2Ho0.2Er0.2Ni (orthorhombic, FeB-type, space group Pnma, no. 62, oP8) compound with high-entropy substitution at the rare earth (R) site of RNi phase orders ferromagnetically at ∼66 K (TC). The hydride sample Gd0.2Tb0.2Dy0.2Ho0.2Er0.2NiH1.4 (orthorhombic, FeB-type) is nanocrystalline and it undergoes a paramagnetic to ferromagnetic order at ∼6 K. From the magnetization vs field (M-H) data, isothermal magnetic entropy change (ΔSm) is calculated. A maximum ΔSm value of −13.1 J kg−1 K−1 is obtained for 70 kOe field change at 8 K. Thus, magnetocaloric effect is slightly reduced in hydride when compared to −16.4 J kg−1 K−1 at 62.5 K in the parent Gd0.2Tb0.2Dy0.2Ho0.2Er0.2Ni compound.

Source: AIP Advances

DOI: 10.1063/9.0000909

Authors: Abhaya Prasada Mohapatra, Dhanya A. R., J. Arout Chelvane, A. V. Morozkin, S. Ramaprabhu, R. Nirmala

Institutions: Indian Institute of Technology Madras, Defence Metallurgical Research Laboratory, Lomonosov Moscow State University

Language: English

Topic: Magnetic and transport properties of perovskites and related materials

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,350

Funders: University Grants Commission, Science and Engineering Research Board