127744 20240319081005.0 doi 10.1016/j.jssc.2022.123356 sideral 129997 ART-2022-129997 eng Palacios Latasa, E. Universidad de Zaragoza (orcid)0000-0003-3567-7030 Heat capacity and magnetocaloric effect in the zircon and scheelite phases of RCrO4, R = Tb, Er, Ho 2022 Access copy available to the general public Unrestricted We present here new magnetization and heat capacity data under magnetic field and direct measurements of the magnetocaloric effect (MCE) in the zircon and the new scheelite phases of RCrO4 (R ¿= ¿Tb, Er, Ho) from 5 ¿K to 100 ¿K, for magnetic fields B from 0 to 9 ¿T. Zircons have a high MCE near their Curie point, TC ¿¿ ¿20 ¿K, reaching maximum isothermal entropy increments, |¿ST| ¿= ¿21, 19.4, and 16.2 ¿J ¿kg-1K-1 for HoCrO4, ErCrO4, and TbCrO4, respectively, for an external field of 5 ¿T. TbCrO4 has another anomaly near TD ¿= ¿60 ¿K associated to a Jahn-Teller transition from the tetragonal zircon structure to an orthorhombic phase. Scheelites are antiferromagnetic with TN ¿¿ ¿25 ¿K. In the Tb scheelite the rare earth is strongly coupled to Cr5+ and the MCE exhibits the typical features of an antiferromagnet, i.e. a sort of Curie-Weiss behavior above TN and a sudden drop to small or even inverse values below. In the Er and Ho scheelites the R3+-Cr5+ exchange coupling is very weak and the R3+ ion behaves independently of the Cr5+. As a striking consequence the MCE is quite stronger well below TN. © 2022 info:eu-repo/grantAgreement/ES/DGA/E100 info:eu-repo/grantAgreement/ES/MICINN/MAT2017-86019-R info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 3.3 2022 CHEMISTRY, INORGANIC & NUCLEAR 13 / 42 = 0.31 2022 Q2 T1 CHEMISTRY, PHYSICAL 88 / 161 = 0.547 2022 Q3 T2 0.58 2022 Ceramics and Composites 2022 Q2 Condensed Matter Physics 2022 Q2 Physical and Theoretical Chemistry 2022 Q2 Inorganic Chemistry 2022 Q2 Materials Chemistry 2022 Q2 Electronic, Optical and Magnetic Materials 2022 Q2 5.6 2022 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Castro Corella, M. Universidad de Zaragoza (orcid)0000-0002-9687-4903 Romero de Paz, J. Gallardo-Amores, J. Sáez-Puche, R. 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 5001 065 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Cienc.Mater. Ingen.Metal. 314 (2022), 123356 J. solid state chem. JOURNAL OF SOLID STATE CHEMISTRY 0022-4596 2209025 http://zaguan.unizar.es/record/127744/files/texto_completo.pdf Postprint 1050266 http://zaguan.unizar.es/record/127744/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:127744 articulos driver 2024-03-18-14:33:31 ARTICLE