150647 20251017144622.0 doi 10.1016/j.jallcom.2021.161847 sideral 128396 ART-2022-128396 eng Palacios, E. Universidad de Zaragoza (orcid)0000-0003-3567-7030 Large magnetocaloric effect in EuGd2O4 and EuDy2O4 2022 Access copy available to the general public Unrestricted Magnetization, heat capacity and direct measurements of the magnetocaloric effect show that EuGd2O4 and EuDy2O4 have a remarkably large magnetocaloric effect at cryogenic temperatures, owing to their high magnetic density and low ordering temperatures. The Gd derivative orders antiferromagnetically at T-N = 4.6 K, while its magnetocaloric effect largely exceeds that of the reference refrigerant Gadolinium Gallium Garnet (GGG) above 5 K. The Dy derivative undergoes two phase transitions at T-C1 = 3.65 K and T-C2 = 4.7 K, respectively, which are the result of a peculiar magnetic arrangement: the first Dy sublattice is parallel to the crystallographic c-axis, while the Eu sublattice makes a variable angle from 0 degrees to 45 degrees with the direction of the second Dy sublattice that lies in the ab-plane. EuDy2O4 has a lower magnetocaloric effect than EuGd2O4, yet larger than GGG. Both ordering mechanisms are semi-quantitatively explained within the frame of a mean-field simulation, which takes into account the magnetic anisotropy strength of the participating magnetic ions. (C) 2021 The Author(s). Published by Elsevier B.V. info:eu-repo/grantAgreement/ES/DGA/E11-20R info:eu-repo/grantAgreement/ES/MICINN/MAT2017-84385-R info:eu-repo/grantAgreement/ES/MICINN/MAT2017-86019-R info:eu-repo/grantAgreement/ES/MICINN/RTI2018-098537-B-C22 info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es 6.2 2022 METALLURGY & METALLURGICAL ENGINEERING 8 / 79 = 0.101 2022 Q1 T1 CHEMISTRY, PHYSICAL 45 / 161 = 0.28 2022 Q2 T1 MATERIALS SCIENCE, MULTIDISCIPLINARY 91 / 343 = 0.265 2022 Q2 T1 1.079 2022 Materials Chemistry 2022 Q1 Metals and Alloys 2022 Q1 Mechanics of Materials 2022 Q1 Mechanical Engineering 2022 Q1 10.9 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Saez-Puche, R. Romero, J. Doi, Y. Hinatsu, Y. Evangelisti, M. (orcid)0000-0002-8028-9064 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 890 (2022), 161847 [13 pp] J. alloys compd. JOURNAL OF ALLOYS AND COMPOUNDS 0925-8388 2484053 http://zaguan.unizar.es/record/150647/files/texto_completo.pdf Versión publicada 2817748 http://zaguan.unizar.es/record/150647/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:150647 articulos driver 2025-10-17-14:22:13 ARTICLE