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20 April 2024

» arxiv » 1703.4430

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Field dependence of the magnetic correlations of the frustrated magnet SrDy$_2$O$_4$
N. Gauthier ; A. Fennell ; B. Prévost ; A. Désilets-Benoit ; H.A. Dabkowska ; O. Zaharko ; M. Frontzek ; R. Sibille ; A.D. Bianchi ; M. Kenzelmann ;
Date:	13 Mar 2017
Abstract:	The frustrated magnet SrDy$_2$O$_4$ exhibits a field-induced phase with a magnetization plateau at $1/3$ of the saturation value for magnetic fields applied along the $b$-axis. We report here a neutron scattering study of the nature and symmetry of the magnetic order in this field-induced phase. Below $Tapprox 0.5$ K, there are strong hysteretic effects, and the order is short or long ranged for zero-field and field cooling, respectively. We find that the long-range ordered magnetic structure within the zig-zag chains is identical to that expected for the one-dimensional axial next-nearest neighbour Ising (ANNNI) model in longitudinal field. The long-range ordered structure in field contrasts with the short-range order found at zero field, and is probably reached through enhanced quantum fluctuations with increasing fields.
Source:	arXiv, 1703.4430
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