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PreprintCC BY 4.0arXiv

A high-entropy form of RMn6Sn6 with distinct magnetotransport regimes correlated to different magnetic structures

  • Kyle W. Fruhling
  • Jonathan Gaudet
  • William D. Ratcliff
  • Jonathan S. White
  • Siddharth Nandanwar
  • Noah J. Fau
  • Gregory T. McCandless
  • Enrique O. González Delgado
  • Julia Y. Chan
  • Oksana Zaharko
  • Michael A. Susner
  • Michael J. Newburger
1 more authors
  • Fazel Tafti
Open at sourcePDFDOICite

Abstract

The kagome RMn6Sn6 material family has attracted significant attention as high-temperature metallic magnets with a host of different magnetic orderings and anisotropy. Theoretical studies point to the rare-earth (R) as the determining factor for both the direction of magnetic anisotropy and the type of magnetic ordering in a given compound. This motivates studying high-entropy forms of RMn6Sn6 to examine how the interplay of several rare-earth elements leads to different magnetic states in a single crystal. Here, we present a rare-earth mix of Tb, Dy, Ho, Er, Tm, and Lu that produces phase transitions from a paramagnet to an easy-plane ferrimagnet (FiM) below TC = 380 K, then to a FiM easy-axis state at TSR1 = 207 K, to a canted FiM ground state below TSR2 = 79 K. This behavior is consistent with previously reported high-entropy RMn6Sn6 compounds; however, uniquely, the rare-earth mix studied here exhibits a broad transition from easy-plane to easy-axis anisotropy from 270 K to 170 K, and reveals a nonmonotonic magnetoresistance. Using neutron scattering data, we found that both observations correlate with an incommensurate modulated contribution to the spin state due to competing rare-earth interactions. This magnetoresistive behavior and the correlated spin structures underscore the potential for rare-earth engineering of magnetism.

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Cite

BibTeXRIS
BibTeX
@misc{fruhling2026highentropy,
  title = {{A high-entropy form of $R$Mn$_6$Sn$_6$ with distinct magnetotransport regimes correlated to different magnetic structures}},
  author = {Kyle W. Fruhling and Jonathan Gaudet and William D. Ratcliff and Jonathan S. White and Siddharth Nandanwar and Noah J. Fau and Gregory T. McCandless and Enrique O. González Delgado and Julia Y. Chan and Oksana Zaharko and Michael A. Susner and Michael J. Newburger and Fazel Tafti},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2608.21633},
  eprint = {2608.21633},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.21633},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - A high-entropy form of RMn_6Sn_6 with distinct magnetotransport regimes correlated to different magnetic structures
AU  - Kyle W. Fruhling
AU  - Jonathan Gaudet
AU  - William D. Ratcliff
AU  - Jonathan S. White
AU  - Siddharth Nandanwar
AU  - Noah J. Fau
AU  - Gregory T. McCandless
AU  - Enrique O. González Delgado
AU  - Julia Y. Chan
AU  - Oksana Zaharko
AU  - Michael A. Susner
AU  - Michael J. Newburger
AU  - Fazel Tafti
PY  - 2026
DA  - 2026/10/20
PB  - arXiv
DO  - 10.48550/arxiv.2608.21633
UR  - https://arxiv.org/abs/2608.21633
AB  - The kagome RMn_6Sn_6 material family has attracted significant attention as high-temperature metallic magnets with a host of different magnetic orderings and anisotropy. Theoretical studies point to the rare-earth (R) as the determining factor for both the direction of magnetic anisotropy and the type of magnetic ordering in a given compound. This motivates studying high-entropy forms of RMn_6Sn_6 to examine how the interplay of several rare-earth elements leads to different magnetic states in a single crystal. Here, we present a rare-earth mix of Tb, Dy, Ho, Er, Tm, and Lu that produces phase transitions from a paramagnet to an easy-plane ferrimagnet (FiM) below T_C = 380 K, then to a FiM easy-axis state at T_SR1 = 207 K, to a canted FiM ground state below T_SR2 = 79 K. This behavior is consistent with previously reported high-entropy RMn_6Sn_6 compounds; however, uniquely, the rare-earth mix studied here exhibits a broad transition from easy-plane to easy-axis anisotropy from 270 K to 170 K, and reveals a nonmonotonic magnetoresistance. Using neutron scattering data, we found that both observations correlate with an incommensurate modulated contribution to the spin state due to competing rare-earth interactions. This magnetoresistive behavior and the correlated spin structures underscore the potential for rare-earth engineering of magnetism.
ER  -