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arXiv · 2506.05645

Magnetic excitations in the 1/3 plateau state in InCu$_3$(OH)$_6$Cl$_3$

Moyu Kato·Hiroyuki K. Yoshida·R. Kumar·Yoshihiko Ihara
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Abstract

Magnetic dynamics in InCu$_3$(OH)$_6$Cl$_3$ was investigated from the NMR relaxation rate measurement. In InCu$_3$(OH)$_6$Cl$_3$, the magnetization isotherm shows a plateau at the 1/3 of full-saturation magnetization, characterizing the 1/3 plateau state. As the 1/3 plateau state appears above 7 T upto 14 T, the microscopic magnetic properties were investigated with the NMR measurement in steady fields. The temperature and field dependence of $1/T_1$ measurement reveals a gap in the magnetic excitation spectrum and its evolution with field in the 1/3 plateau state. The field dependence of spin gap provides an important information to understand the microscopic origin of 1/3 plateau state in the kagome antiferromagnets.

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Moyu Kato, Hiroyuki K. Yoshida, R. Kumar, Yoshihiko Ihara. 2025-06-06. Magnetic excitations in the 1/3 plateau state in InCu$_3$(OH)$_6$Cl$_3$. https://doi.org/10.7566/jpsj.94.083704

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