Coexistence of G- and C-type orbital ordered phases and its correlation with magnetization reversal in YVO3

Rana Saha, Francois Fauth, Vincent Caignaert, and A. Sundaresan
Phys. Rev. B 95, 184107 – Published 19 May 2017
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Abstract

It is known that the orbital disordered orthorhombic (Pnma) perovskite, YVO3, undergoes a transition to the G-type orbital ordered monoclinic phase (P1121/a) at TGOO200K followed by a first-order transition to the C-type orbital ordered orthorhombic phase (Pnma) at TS77K. In contrast, using the high-angular-resolution synchrotron x-ray powder diffraction technique, we find that the C-type orbital ordered phase appears at TN=116K and coexists with the G-type monoclinic phase down to TS77K. The coexistence of different orbital ordered states in the temperature range TS<T<TN is discussed based on large octahedral distortion caused by smaller Y ions present at the A site of the perovskite. Intriguingly, the temperature evolution of the coexistence of the G- and C-type orbital ordered phases and associated magnetic structures could be responsible for the temperature-induced magnetization reversal observed in the temperature interval TS<T<TN. We also discuss that the correlation of phase coexistence and magnetization reversal is present in other RVO3 systems.

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  • Received 10 December 2016
  • Revised 5 April 2017

DOI:https://doi.org/10.1103/PhysRevB.95.184107

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Rana Saha1, Francois Fauth2, Vincent Caignaert3, and A. Sundaresan1,*

  • 1Chemistry and Physics of Materials Unit and International Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560 064, India
  • 2CELLS-ALBA Synchrotron, E-08290 Cerdanyola del Vallès, Barcelona, Spain
  • 3CRISMAT, UMR 6508, CNRS-ENSICAEN, 6 Bd Marechal Juin, 14050 Caen, France

  • *Corresponding author: sundaresan@jncasr.ac.in

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Issue

Vol. 95, Iss. 18 — 1 May 2017

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