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arXiv · 2406.00694

Uncommon magnetic ordering in the quantum magnet Yb$_{3}$Ga$_{5}$O$_{12}$

S. Raymond·E. Lhotel·E. Riordan·E. Ressouche·K. Beauvois·C. Marin·M. E. Zhitomirsky
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Abstract

The antiferromagnetic structure of Yb$_{3}$Ga$_{5}$O$_{12}$ is identified by neutron diffraction experiments below the previously-known transition at $T_{\lambda}=54$ mK. The magnetic propagation vector is found to be ${\bf k}=(1/2, 1/2, 0)$, an unusual wave-vector in the garnet structure. The associated complex magnetic structure highlights the role of exchange interactions in a nearly isotropic system dominated by dipolar interactions and finds echos with exotic structures theoretically proposed. Reduced values of the ordered moments may indicate significant quantum fluctuations in this effective spin-1/2 geometrically frustrated magnet.

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S. Raymond, E. Lhotel, E. Riordan, E. Ressouche, K. Beauvois, C. Marin, M. E. Zhitomirsky. 2024-06-02. Uncommon magnetic ordering in the quantum magnet Yb$_{3}$Ga$_{5}$O$_{12}$. https://doi.org/10.1103/physrevlett.133.236701

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