71020 20180622145034.0 doi 10.1103/PhysRevB.90.214423 sideral 97200 ART-2014-97200 eng (orcid)0000-0003-3567-7030 Palacios, E. Universidad de Zaragoza Magnetic structure and magnetocalorics of GdPO4 2014 Access copy available to the general public Unrestricted The magnetic ordering structure of GdPO4 is determined at T=60 mK by the diffraction of hot neutrons with wavelength ¿=0.4696 Å. It corresponds to a noncollinear antiferromagnetic arrangement of the Gd moments with propagation vector k=(1/2,0,1/2). This arrangement is found to minimize the dipole-dipole interaction and the crystal-field anisotropy energy, the magnetic superexchange being much smaller. The intensity of the magnetic reflections decreases with increasing temperature and vanishes at T˜0.8 K, in agreement with the magnetic ordering temperature TN=0.77 K, as reported in previous works based on heat capacity and magnetic susceptibility measurements. The magnetocaloric parameters have been determined from heat capacity data at constant applied fields up to 7 T, as well as from isothermal magnetization data. The magnetocaloric effect, for a field change ¿B=0-7T, reaches -¿ST=375.8mJ/cm3K-1 at T=2.1 K, largely exceeding the maximum values reported to date for Gd-based magnetic refrigerants. info:eu-repo/grantAgreement/ES/MINECO/MAT2012-38318-C03-01 info:eu-repo/grantAgreement/ES/MINECO/MAT2013-44063-R info:eu-repo/semantics/openAccess by-nc http://creativecommons.org/licenses/by-nc/3.0/es/ 3.736 2014 PHYSICS, CONDENSED MATTER 14 / 66 = 0.212 2014 Q1 T1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion (orcid)0000-0002-8505-5232 Rodriguez-Velamazan, J.A. (orcid)0000-0002-8028-9064 Evangelisti, M. Universidad de Zaragoza McIntyre, G.J. (orcid)0000-0002-4078-6808 Lorusso, G. Visser, D. de Jongh, L.J. Boatner, L.A. 2003 395 Universidad de Zaragoza Departamento de Física de la Materia Condensada Física de la Materia Condensada 90, 21 (2014), 214423 [9 pp] Phys. Rev. B, Condens. matter mater. phys. Physical Review B. Condensed Matter and Materials Physics 1098-0121 608043 http://zaguan.unizar.es/record/71020/files/texto_completo.pdf Versión publicada 132434 http://zaguan.unizar.es/record/71020/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:71020 articulos driver 2018-06-22-14:15:26 ARTICLE