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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
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 | ||||||||
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| Subjects: | Q Science > QC Physics T Technology > TN Mining engineering. Metallurgy |
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| 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: |
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| 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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