Magnetic field tuning of modulated magnetic orders in CrOCl at the two-dimensional limit

Abstract

Chromium oxychloride is a van der Waals magnet with intrinsic competing exchange interactions, including a strong antiferromagnetic one, source of a very rich magnetic phase diagram, with ferrimagnetic, antiferromagnetic, and canted states, up to high magnetic fields. We investigate the sequence of these magnetic phases in thin layers of CrOCl using magneto-Raman scattering spectroscopy. We identify phases whose magnetic order is commensurate with the atomic lattice, and find signatures of strong magneto-striction, presumably of exchange origin. The coupling of the spin and atomic degrees of freedom in the crystal is observed down to the single-layer limit — phonon modes significantly soften or stiffen, in a complex way due to the competition of interactions. The domains existence of the different phases change with the number of layers.

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BibTeX RIS

BibTeX

@article{riccardi2026magnetic,
  title = {{Magnetic field tuning of modulated magnetic orders in CrOCl at the two-dimensional limit}},
  author = {Tristan Riccardi and Amit Pawbake and Shalini Badola and Floriant Petot and Benoît Grémaud and Andrés Saúl and Kiran Singh and Niranjana Renjith Nair and Rasmiya Shirin Chemban and Zdenek Sofer and Johann Coraux and Clément Faugeras},
  journal = {Small},
  year = {2026},
  month = aug,
  doi = {10.1002/smll.75377},
  eprint = {2603.09836},
  archivePrefix = {arXiv},
  url = {https://hal.science/hal-05766853v1},
  note = {CC BY 4.0},
}

RIS

TY  - JOUR
TI  - Magnetic field tuning of modulated magnetic orders in CrOCl at the two-dimensional limit
AU  - Tristan Riccardi
AU  - Amit Pawbake
AU  - Shalini Badola
AU  - Floriant Petot
AU  - Benoît Grémaud
AU  - Andrés Saúl
AU  - Kiran Singh
AU  - Niranjana Renjith Nair
AU  - Rasmiya Shirin Chemban
AU  - Zdenek Sofer
AU  - Johann Coraux
AU  - Clément Faugeras
PY  - 2026
DA  - 2026/08/21
JO  - Small
DO  - 10.1002/smll.75377
UR  - https://hal.science/hal-05766853v1
AB  - Chromium oxychloride is a van der Waals magnet with intrinsic competing exchange interactions, including a strong antiferromagnetic one, source of a very rich magnetic phase diagram, with ferrimagnetic, antiferromagnetic, and canted states, up to high magnetic fields. We investigate the sequence of these magnetic phases in thin layers of CrOCl using magneto-Raman scattering spectroscopy. We identify phases whose magnetic order is commensurate with the atomic lattice, and find signatures of strong magneto-striction, presumably of exchange origin. The coupling of the spin and atomic degrees of freedom in the crystal is observed down to the single-layer limit — phonon modes significantly soften or stiffen, in a complex way due to the competition of interactions. The domains existence of the different phases change with the number of layers.
SN  - 1613-6810
SN  - 1613-6829
ER  -

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