ISIS Neutron and Muon Source Data Journal

Spin reorientation and the low-temperature magnetic structure of Ho2CuMnMn4O12

Abstract: R2CuMnMn4O12 compounds with R = Y, Dy, and Er host a sequence of magnetic phase transitions characterised by spin-reorientation, large spin canting, and a low-temperature k=(0,0,1/2) modulation. However, the exact microscopic origin of this modulation and the complex magnetic ground state has not been resolved. Bulk physical property measurements indicate that Ho2CuMnMn4O12 hosts a similar sequence of transitions but with a split low-temperature response: a clear specific-heat anomaly at TAFM ~ 18 K and a separate magnetic susceptibility anomaly at TN3 ~12 K. Studying this split transition by neutron powder diffraction will enable us to decompose the magnetic ground state and decisively test how transition-metal spin canting and rare-earth anisotropy generate the unusual low-temperature physics of the R2CuMnMn4O12 series.

Principal Investigator: Dr Roger Johnson
Local Contact: Dr Dmitry Khalyavin
Experimenter: Dr Alexei Belik
Experimenter: Mr Bangye Qin

DOI: 10.5286/ISIS.E.RB2620144

ISIS Experiment Number: RB2620144

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:
Dr Roger Johnson et al; (2026): Spin reorientation and the low-temperature magnetic structure of Ho2CuMnMn4O12, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2620144

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