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arXiv · 2201.11778

Robust antiferromagnetism in Y$_2$Co$_3$

Yunshu Shi·David S. Parker·Eun Sang Choi·Kasey P. Devlin·Li Yin·Jingtai Zhao·Peter Klavins·Susan M. Kauzlarich·Valentin Taufour
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Abstract

We report on a solution-growth based method to synthesise single crystals of Y$_2$Co$_3$ and on its structural and magnetic properties. We find that Y$_2$Co$_3$ crystallizes in the La2Ni3-type orthorhombic structure with space group Cmce (No. 64), with Co forming distorted kagome lattices. Y$_2$Co$_3$ orders antiferromagnetically below $T_N$ = 252 K. Magnetization measurements reveal that the moments are primarily aligned along the b axis with evidence for some canting. Band-structure calculations indicate that ferromagnetic and antiferromagnetic orders are nearly degenerate, at odds with experimental results. Magnetization measurements under pressure up to 1 GPa reveal that the N/'eel temperature decreases with the slope of -1.69 K/GPa. We observe a field-induced spin-flop transition in the magnetization measurements at 1.5 K and 21 T with magnetic field along the b direction. The magnetization is not saturated up to 35 T, indicating that the antiferromagnetic ordering in Y$_2$Co$_3$ is quite robust, which is surprising for such a Co-rich intermetallic.

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Yunshu Shi, David S. Parker, Eun Sang Choi, Kasey P. Devlin, Li Yin, Jingtai Zhao, Peter Klavins, Susan M. Kauzlarich, Valentin Taufour. 2022-01-27. Robust antiferromagnetism in Y$_2$Co$_3$. https://doi.org/10.1103/physrevb.104.184407

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