Magnetic structure and magnetocalorics of GdPO4
Palacios, E. (Universidad de Zaragoza) ; Rodriguez-Velamazan, J.A. ; Evangelisti, M. (Universidad de Zaragoza) ; McIntyre, G.J. ; Lorusso, G. ; Visser, D. ; de Jongh, L.J. ; Boatner, L.A.
Resumen: 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.
Idioma: Inglés
DOI: 10.1103/PhysRevB.90.214423
Año: 2014
Publicado en: Physical Review B. Condensed Matter and Materials Physics 90, 21 (2014), 214423 [9 pp]
ISSN: 1098-0121
Factor impacto JCR: 3.736 (2014)
Categ. JCR: PHYSICS, CONDENSED MATTER rank: 14 / 66 = 0.212 (2014) - Q1 - T1
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2012-38318-C03-01
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2013-44063-R
Tipo y forma: Article (Published version)
Área (Departamento): Física de la Materia Condensada (Departamento de Física de la Materia Condensada)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
Exportado de SIDERAL (2018-06-22-14:15:26)
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Idioma: Inglés
DOI: 10.1103/PhysRevB.90.214423
Año: 2014
Publicado en: Physical Review B. Condensed Matter and Materials Physics 90, 21 (2014), 214423 [9 pp]
ISSN: 1098-0121
Factor impacto JCR: 3.736 (2014)
Categ. JCR: PHYSICS, CONDENSED MATTER rank: 14 / 66 = 0.212 (2014) - Q1 - T1
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2012-38318-C03-01
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2013-44063-R
Tipo y forma: Article (Published version)
Área (Departamento): Física de la Materia Condensada (Departamento de Física de la Materia Condensada)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2018-06-22-14:15:26)
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Record created 2018-06-22, last modified 2018-06-22