Magnetic and magnetocaloric effect study of a polycrystalline GdSrCaMnO compound.

Phys Chem Chem Phys

CMP Division, Saha Institute of Nuclear Physics, HBNI, AF-Bidhannagar, Kolakta, 700064, India.

Published: April 2022

The magnetic and magnetocaloric properties of polycrystalline GdSrCaMnO ( = 0.0, 0.2, 0.3, 0.4 and 0.5) compounds have been investigated. Depending upon the Ca and Sr proportions, fascinating magnetic ground states were observed in the GdSrCaMnO compounds. Here, the dominating nature of the canted magnetic state (for the GdCaMnO compound) and glassy (disordered ferromagnetic) magnetic state (for the GdSrMnO compound) are observed. However, for the intermediate doped samples ( = 0.2, 0.3, 0.4), a competing nature is found in their magnetic and exchange bias properties. Additionally, in the low temperature region, a significantly large magnetocaloric effect is observed for all the samples. At a 70 kOe external magnetic field, the highest observed value of the magnetocaloric entropy change is 21.58 J kg K (for the GdCaMnO sample) and the lowest is 10.15 J kg K (for the GdSrMnO sample).

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http://dx.doi.org/10.1039/d2cp00114dDOI Listing

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