ISIS Neutron and Muon Source Data Journal

Magnetic structure of altermagnetic Cr0.75Mn0.25Sb

Abstract: Recently, we demonstrated the feasibility of tuning the electronic and magnetic properties of a prototypical altermagnet to achieve the symmetry conditions required for electrical read-out in spintronics applications. Specifically, we provided strong evidence that hexagonal CrSb, an altermagnet with exceptionally high ordering temperature and excellent electrical conductivity, can be engineered through partial substitution of Cr by Mn. This modification enables electrical read-out of the Neel vector orientation via measurements of the anomalous Hall effect (AHE) [Fis26]. Our combined transport measurements and micromagnetic simulations indicate that, in Cr0.75Mn0.25Sb(100) epitaxial thin films, the magnetic easy axis is tilted within the plane, away from the [0001] direction. We now propose to verify this prediction by directly determining the Neel vector orientation using neutron diffraction. This rapid access proposal builds on our previous regular proposal (RB2610177), for which we were asked to demonstrate that the observed AHE signal does not scale with magnetization. As discussed in Ref. [Fis26] (see Eq. 1 therein), such scaling is not expected on theoretical grounds. Consistently, our SQUID magnetometry measurements reveal no detectable magnetization in the magnetic field range where the AHE is observed. [Fis26]M. Fischer, M. Jourdan et al. Engineering altermagnetic symmetry to enable anomalous Hall response in Cr1-xMnxSb https://doi.org/10.48550/arXiv.2602.06173

Principal Investigator: Professor Martin Jourdan
Experimenter: Mr Lukas Odenbreit
Local Contact: Dr Pascal Manuel

DOI: 10.5286/ISIS.E.RB2600021

ISIS Experiment Number: RB2600021

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Martin Jourdan et al; (2026): Magnetic structure of altermagnetic Cr0.75Mn0.25Sb, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2600021

Data is released under the CC-BY-4.0 license.