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PreprintarXiv licencearXiv

Large exchange bias from coupled antiferromagnetic order and glassy magnetic freezing in Co0.36NbS2

  • Suman Mondal
  • Himadri Roy Dakua
  • Raz Luger
  • Muntaser Naamneh
  • Eran Maniv
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Abstract

Magnetization measurements on single-crystalline Co0.36NbS2 reveal antiferromagnetic order near TN ≃ 26 K and a lower-temperature history-dependent magnetic response consistent with glassy freezing of a subset of magnetic moments. After field cooling, M(H) loops exhibit a sizable exchange-bias shift, reaching |HEB| ≃ 4.4 kOe at $1.8 K$ for a $70 kOe$ field-cooling sweep protocol. The training effect, field-sweep and cooling-field protocol dependence, and disappearance of the bias near a blocking temperature TB ≃ 12 K, well below TN, support an interpretation in which frozen uncompensated moments are exchange-coupled to an antiferromagnetic matrix. These results suggest that antiferromagnetic-glassy-moment coupling may provide a broader route to exchange bias in off-stoichiometric magnetic NbS2 intercalates.

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Cite

BibTeXRIS
BibTeX
@misc{mondal2026large,
  title = {{Large exchange bias from coupled antiferromagnetic order and glassy magnetic freezing in $Co_0.36NbS_2$}},
  author = {Suman Mondal and Himadri Roy Dakua and Raz Luger and Muntaser Naamneh and Eran Maniv},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.25102},
  eprint = {2610.25102},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.25102},
}
RIS
TY  - UNPB
TI  - Large exchange bias from coupled antiferromagnetic order and glassy magnetic freezing in Co_0.36NbS_2
AU  - Suman Mondal
AU  - Himadri Roy Dakua
AU  - Raz Luger
AU  - Muntaser Naamneh
AU  - Eran Maniv
PY  - 2026
DA  - 2026/10/18
PB  - arXiv
DO  - 10.48550/arxiv.2610.25102
UR  - https://arxiv.org/abs/2610.25102
AB  - Magnetization measurements on single-crystalline Co_0.36NbS_2 reveal antiferromagnetic order near T_N ≃ 26 K and a lower-temperature history-dependent magnetic response consistent with glassy freezing of a subset of magnetic moments. After field cooling, M(H) loops exhibit a sizable exchange-bias shift, reaching |H_EB| ≃ 4.4 kOe at $1.8 K$ for a $70 kOe$ field-cooling sweep protocol. The training effect, field-sweep and cooling-field protocol dependence, and disappearance of the bias near a blocking temperature T_B ≃ 12 K, well below T_N, support an interpretation in which frozen uncompensated moments are exchange-coupled to an antiferromagnetic matrix. These results suggest that antiferromagnetic-glassy-moment coupling may provide a broader route to exchange bias in off-stoichiometric magnetic NbS_2 intercalates.
ER  -