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dc.contributor.authorÁlvarez-Alonso, Pablo-
dc.contributor.authorGorria, P.-
dc.contributor.authorPuente-Orench, I.-
dc.contributor.authorSánchez-Marcos, J.-
dc.contributor.authorBlanco, J. A.-
dc.identifier.citationActa Materialia 61(20): 7931-7937 (2013)es_ES
dc.descriptionet al.es_ES
dc.description.abstractWe have synthesized the Dy2Fe17 alloy with an unconventional crystal structure (R3̄m space group). Neutron powder thermo-diffraction and X-ray powder diffraction under high pressure (up to 15 GPa) show that the rhombohedral crystal structure is stable. Likewise, the alloy with the usual hexagonal crystal structure (P63/mmc), the rhombohedral variant of Dy2Fe17 compound, exhibits a collinear ferrimagnetic order below the Curie temperature (TC ≈ 363 K), with antiparallel mutual alignment of the Dy and Fe sublattices. Additionally, we have observed two distinctive issues related to magneto-volume anomalies: (i) the pressure dependence of the cell volume at room temperature shows the existence of a critical pressure at which the compound is no longer ferrimagnetic; and (ii) the cell volume shows invar-like behaviour in a wide temperature range (2-290 K), with a minimum at T ≈ 380 K. The spontaneous volume magnetostriction reaches ωS = 1.6 × 10 -2 at 2 K that decreases to zero at T ≈ 500 K (≈1.4 T C), which is associated with the existence of short-range magnetic correlations.es_ES
dc.description.sponsorshipFinancial support from Spanish MICINN (project MAT2011-27573-C04) and Mexican CONACYT (project CB-2010-01-156932) is acknowledged. J.L. Sánchez Llamazares also acknowledges the support received from Laboratorio Nacional de Investigaciones en Nanociencias y Nanotecnología (LINAN, IPICyT). M. Reiffers acknowledges the VEGA 2/0070/12 contract. The CEX Nanofluid as the Centre of Excellence SAS, the structural EXTREM 26220120005, NANOFLUID 26220120021 and the SCTs at the University of Oviedo are also acknowledged.es_ES
dc.subjectX-ray and neutron diffractiones_ES
dc.subjectRare earth/iron alloyses_ES
dc.subjectCrystal and magnetic structureses_ES
dc.subjectHigh pressurees_ES
dc.subjectMagneto-volume anomalieses_ES
dc.titleExploring the magneto-volume anomalies in Dy2Fe17 with unconventional rhombohedral crystal structurees_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderMinisterio de Ciencia e Innovación (España)-
dc.contributor.funderVEGA Agency (Slovakia)-
dc.contributor.funderUniversidad de Oviedo-
dc.contributor.funderConsejo Nacional de Ciencia y Tecnología (México)-
dc.contributor.funderInstituto Potosino de Investigación Científica y Tecnológica-
dc.contributor.funderSlovak Academy of Sciences-
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