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20 April 2024

» arxiv » cond-mat/0506432

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Structural dichroism in the antiferromagnetic insulating phase of V_2O_3
C. Meneghini ; S. Di Matteo ; C. Monesi ; T. Neisius ; L. Paolasini ; S. Mobilio ; C. R. Natoli ; P.A. Metcalf ; J.M. Honig ;
Date:	17 Jun 2005
Subject:	Strongly Correlated Electrons \| cond-mat.str-el
Abstract:	We performed near-edge x-ray absorption spectroscopy (XANES) at V K edge in the antiferromagnetic insulating (AFI) phase of a 2.8% Cr-doped V_2O_3 single crystal. Linear dichroism of several percent is measured in the hexagonal plane and found to be in good agreement with ab-initio calculations based on multiple scattering theory. This experiment definitively proves the structural origin of the signal and therefore solves a controversy raised by previous interpretations of the same dichroism as non-reciprocal. It also calls for a further investigation of the role of the magnetoelectric annealing procedure in cooling to the AFI phase.
Source:	arXiv, cond-mat/0506432
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