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Critical behavior study of the spin ordering transition in RVO3 (R = Ce, Pr, Nd, Sm, Gd, Er) by means of ac photopyroelectric calorimetry

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Oleaga, A., Shvalya, V., Liubachko, V., Balakrishnan, Geetha, Tung, L. D. and Salazar, A. (2017) Critical behavior study of the spin ordering transition in RVO3 (R = Ce, Pr, Nd, Sm, Gd, Er) by means of ac photopyroelectric calorimetry. Journal of Alloys and Compounds, 703 . pp. 210-215. doi:10.1016/j.jallcom.2017.01.361

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Official URL: http://dx.doi.org/10.1016/j.jallcom.2017.01.361

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Abstract

The thermal diffusivity of RVO3 single crystals (R = Ce, Pr, Nd, Sm, Gd, and Er) has been measured with an ac photopyroelectric calorimetry in the region in which the G-type orbital ordering and C-type spin ordering take place. Detailed measurements in the close neighbourhood of the spin ordering temperature have allowed to extract the critical parameter α and the critical ratio A+/A− for this transition. While the samples containing Ce, Nd, Sm and Er belong to the 3D-XY universality class (showing that the spins have an easy plane anisotropy), the sample with Gd, which is known to present a clear easy axis, belongs to the 3D-Ising class. Finally, PrVO3 shows an effective isotropic behavior, as the critical parameters found agree with the 3D-Heisenberg class.

Item Type: Journal Article
Subjects: Q Science > QC Physics
T Technology > TN Mining engineering. Metallurgy
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Vanadium oxide -- Magnetic properties, Phase transformations (Statistical physics), Calorimetry
Journal or Publication Title: Journal of Alloys and Compounds
Publisher: Elsevier BV
ISSN: 0925-8388
Official Date: 5 May 2017
Dates:
DateEvent
5 May 2017Published
2 February 2017Available
31 January 2017Accepted
Volume: 703
Page Range: pp. 210-215
DOI: 10.1016/j.jallcom.2017.01.361
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Copyright Holders: Elsevier B.V
Funder: Universidad del País Vasco, Engineering and Physical Sciences Research Council (EPSRC)
Grant number: EP/M028771/1 (EPSRC)

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