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Coexistence of long-range magnetic order and dynamical magnetism in the V-based kagome metals: A combined thermodynamic and μSR study

Sheetal Devi1,*,†, Yishui Zhou1,2, Thomas J. Hicken3, Zurab Guguchia3, Hubertus Luetkens3, Min-Kai Lee4, Lieh-Jeng Chang4, and Yixi Su1,‡

  • *Contact author: sdevi250495@gmail.com
  • †Present address: Graduate School of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan.
  • ‡Contact author: y.su@fz-juelich.de
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Phys. Rev. B 113, 104443 – Published 25 March, 2026

DOI: https://doi.org/10.1103/wkd3-qqgr

Abstract

V-based kagome metals exhibit a unique lattice geometry that can give rise to exotic electronic and magnetic phenomena, making them an ideal platform to study the interplay of topology and magnetism. We present a combined thermodynamic and muon spin relaxation (μSR) investigation of single-crystal RV6Sn6 (R=Tb, Dy, Ho, Er) compounds, focusing on their low-temperature magnetic behavior. Heat-capacity and μSR measurements reveal distinct magnetic phase transitions below 4 K, confirming the emergence of long-range magnetic order in all compounds studied. The μSR results further indicate persistent spin fluctuations within the magnetically ordered state down to 50 mK, reflected in reduced ordered moments obtained from a hyperfine analysis of the heat-capacity measurements. These findings uncover the coexistence of static and dynamic magnetism in V-based kagome metals and emphasizing the key role of 4f-electron anisotropy in shaping their magnetic ground states. Compared with the Mn-based RMn6Sn6 analogs, our results highlight the unique magnetism arising from the decoupled rare-earth sublattice and its interplay with the nonmagnetic V kagome network.

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Phys. Rev. B 113, 104443– Published 25 March, 2026
  • Received 12 December 2025
  • Accepted 2 March 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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