Magnetic and magnetocaloric properties in Gd1-yPryNi2 compounds
Abstract
In this work, we report the magnetic and magnetocaloric properties of the Gd1-yPryNi2 compounds from both experimental and theoretical points of view. It is worth noting that this series shows a variety of magnetic arrangements depending on the Pr concentration, including paramagnetism, ferrimagnetism and ferromagnetism. Our experimental work consists of the systematic analysis of the magnetic properties of the compounds with y = 0.0, 0.25, 0.5, 0.75 and 1.0, which includes temperature and magnetic field dependence of the magnetization, heat capacity and isothermal entropy change obtained by isothermal magnetization curves. Also, we developed a model Hamiltonian, which takes into account the exchange interactions among Gd-Gd, Gd-Pr and Pr-Pr ions, the Zeeman interaction for both ions and the crystalline electrical field interaction for the Pr ions. We systematically investigated the magnetic properties of the series and obtained a good agreement when compared with our experimental data.
- Publication:
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Journal of Magnetism and Magnetic Materials
- Pub Date:
- March 2018
- DOI:
- 10.1016/j.jmmm.2017.10.044
- Bibcode:
- 2018JMMM..449..308A
- Keywords:
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- Magnetocaloric effect;
- Crystalline electrical field;
- Rare-earth compounds;
- Numerical simulation