000071020 001__ 71020 000071020 005__ 20180622145034.0 000071020 0247_ $$2doi$$a10.1103/PhysRevB.90.214423 000071020 0248_ $$2sideral$$a97200 000071020 037__ $$aART-2014-97200 000071020 041__ $$aeng 000071020 100__ $$0(orcid)0000-0003-3567-7030$$aPalacios, E.$$uUniversidad de Zaragoza 000071020 245__ $$aMagnetic structure and magnetocalorics of GdPO4 000071020 260__ $$c2014 000071020 5060_ $$aAccess copy available to the general public$$fUnrestricted 000071020 5203_ $$aThe 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. 000071020 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/MAT2012-38318-C03-01$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2013-44063-R 000071020 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc$$uhttp://creativecommons.org/licenses/by-nc/3.0/es/ 000071020 590__ $$a3.736$$b2014 000071020 591__ $$aPHYSICS, CONDENSED MATTER$$b14 / 66 = 0.212$$c2014$$dQ1$$eT1 000071020 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000071020 700__ $$0(orcid)0000-0002-8505-5232$$aRodriguez-Velamazan, J.A. 000071020 700__ $$0(orcid)0000-0002-8028-9064$$aEvangelisti, M.$$uUniversidad de Zaragoza 000071020 700__ $$aMcIntyre, G.J. 000071020 700__ $$0(orcid)0000-0002-4078-6808$$aLorusso, G. 000071020 700__ $$aVisser, D. 000071020 700__ $$ade Jongh, L.J. 000071020 700__ $$aBoatner, L.A. 000071020 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDepartamento de Física de la Materia Condensada$$cFísica de la Materia Condensada 000071020 773__ $$g90, 21 (2014), 214423 [9 pp]$$pPhys. Rev. B, Condens. matter mater. phys.$$tPhysical Review B. Condensed Matter and Materials Physics$$x1098-0121 000071020 8564_ $$s608043$$uhttps://zaguan.unizar.es/record/71020/files/texto_completo.pdf$$yVersión publicada 000071020 8564_ $$s132434$$uhttps://zaguan.unizar.es/record/71020/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000071020 909CO $$ooai:zaguan.unizar.es:71020$$particulos$$pdriver 000071020 951__ $$a2018-06-22-14:15:26 000071020 980__ $$aARTICLE