Atomic magnetic moments of chemically ordered FeRh nanocrystals on SrTiO3(001)

Abstract

The magnetic order in FeRh is highly sensitive to its local atomic environment, as illustrated by the persistence of ferromagnetism at low temperature in chemically ordered B2-FeRh nanocrystals, in contrast to bulk FeRh. Here, we investigate B2-FeRh nanocrystals deposited on SrTiO₃(001) by combining soft and hard X-ray magnetic circular dichroism at the Fe and Rh L₂,₃ edges. The use of hard X-rays enables a quantitative determination of the Rh magnetic moment in this system. Both Fe and Rh moments are found to be moderately reduced compared with those measured in equivalent nanocrystals embedded in amorphous carbon. As no residual A1 phase, chemical interdiffusion, or oxidation has been detected, it is suggested that an interfacial effect is occuring, which could potentially arise from modifications to the electronic structure and/or strain at the interface.

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BibTeX RIS

BibTeX

@misc{moreau2026atomic,
  title = {{Atomic magnetic moments of chemically ordered FeRh nanocrystals on SrTiO3(001)}},
  author = {J Moreau and V Dupuis and G Herrera and S Gonzalez and I Cañero-Infante and M Bugnet and P Ohresser and E Otero and F Wilhelm and A Rogalev and A Reyes and O Boisron and F Tournus and D Le Roy},
  howpublished = {HAL},
  year = {2026},
  month = oct,
  url = {https://hal.science/hal-05793972v1},
  note = {CC BY 4.0},
}

RIS

TY  - UNPB
TI  - Atomic magnetic moments of chemically ordered FeRh nanocrystals on SrTiO3(001)
AU  - J Moreau
AU  - V Dupuis
AU  - G Herrera
AU  - S Gonzalez
AU  - I Cañero-Infante
AU  - M Bugnet
AU  - P Ohresser
AU  - E Otero
AU  - F Wilhelm
AU  - A Rogalev
AU  - A Reyes
AU  - O Boisron
AU  - F Tournus
AU  - D Le Roy
PY  - 2026
DA  - 2026/10/12
PB  - HAL
UR  - https://hal.science/hal-05793972v1
AB  - The magnetic order in FeRh is highly sensitive to its local atomic environment, as illustrated by the persistence of ferromagnetism at low temperature in chemically ordered B2-FeRh nanocrystals, in contrast to bulk FeRh. Here, we investigate B2-FeRh nanocrystals deposited on SrTiO₃(001) by combining soft and hard X-ray magnetic circular dichroism at the Fe and Rh L₂,₃ edges. The use of hard X-rays enables a quantitative determination of the Rh magnetic moment in this system. Both Fe and Rh moments are found to be moderately reduced compared with those measured in equivalent nanocrystals embedded in amorphous carbon. As no residual A1 phase, chemical interdiffusion, or oxidation has been detected, it is suggested that an interfacial effect is occuring, which could potentially arise from modifications to the electronic structure and/or strain at the interface.
ER  -

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