Magnetic structure and magnetocalorics of GdPO4

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dc.contributor.authorPalacios, Een_AU
dc.contributor.authorRodríguez-Velamazán, JAen_AU
dc.contributor.authorEvangelisti, Men_AU
dc.contributor.authorMcIntyre, GJen_AU
dc.contributor.authorLorusso, Gen_AU
dc.contributor.authorVisser, Den_AU
dc.contributor.authorde Jongh, LJen_AU
dc.contributor.authorBoatner, LAen_AU
dc.date.accessioned2016-10-11T01:00:42Zen_AU
dc.date.available2016-10-11T01:00:42Zen_AU
dc.date.issued2014-10-21en_AU
dc.date.statistics2016-10-11en_AU
dc.description.abstractThe magnetic ordering structure of GdPO 4 is determined at T=60 mK by the diffraction of hot neutrons with wavelength λ=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 T N =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 ΔB=0−7T , reaches −ΔS T =375.8mJ/cm 3 K −1 at T=2.1 K, largely exceeding the maximum values reported to date for Gd-based magnetic refrigerants.© 2014, American Physical Society.en_AU
dc.identifier.articlenumber214423en_AU
dc.identifier.citationPalacios, E., Rodríguez-Velamazán, J. A., Evangelisti, M., McIntyre, G. J., Lorusso, G. Visser, D., de Jongh, L. J., & Boatner, L. A.(2014). Magnetic structure and magnetocalorics of GdPO4. Physical Review B, 90(21), 214423. doi:10.1103/PhysRevB.90.214423en_AU
dc.identifier.govdoc7265en_AU
dc.identifier.issn2469-9969en_AU
dc.identifier.issue21en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevB.90.214423en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7703en_AU
dc.identifier.volume90en_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectDiffractionen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectAnisotropyen_AU
dc.subjectHeaten_AU
dc.subjectDipolesen_AU
dc.subjectIsothermal processesen_AU
dc.titleMagnetic structure and magnetocalorics of GdPO4en_AU
dc.typeJournal Articleen_AU
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