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

Saha, Rana ; Fauth, Francois ; Caignaert, Vincent ; Sundaresan, A. (2017) Coexistence of G - and C -type orbital ordered phases and its correlation with magnetization reversal in YVO3 Physical Review B: Condensed Matter and Materials Physics, 95 (18). ISSN 2469-9950

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Official URL: http://doi.org/10.1103/PhysRevB.95.184107

Related URL: http://dx.doi.org/10.1103/PhysRevB.95.184107

Abstract

It is known that the orbital disordered orthorhombic (Pnma) perovskite, YVO3, undergoes a transition to the G-type orbital ordered monoclinic phase (P112(1)/a) at TG-OO similar to 200 K followed by a first-order transition to the C-type orbital ordered orthorhombic phase (Pnma) at T-S similar to 77 K. 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 = 116 K and coexists with the G-type monoclinic phase down to TS similar to 77 K. 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 T-S < T < T-N. We also discuss that the correlation of phase coexistence and magnetization reversal is present in other RVO3 systems.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:119993
Deposited On:21 Jun 2021 07:42
Last Modified:21 Sep 2021 09:29

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