ISIS Neutron and Muon Source Data Journal

Shell-ferromagnetism of nanoscaled Heusler precipitates

Abstract: The material Ni50Mn45In5 segregates at about 650 K forming about 2-10 nm ferromagnetic N50Mn25In25 precipitates with a Curie temperature of 320 K and an antiferromagnetic Ni50Mn50 matrix with a Neel temperature estimated to be around 960 K. If the material is allowed to segregate under a magnetic field at 650 K, the spherical precipitates become a shell-ferromagnet where the surface (being at the same time the interface with the antiferromagnet) acquires a ferromagnetic configuration along the field direction, but the volume is paramagnetic. The spins of the shell-ferromagnet are so strongly pinned by the antiferromagnetic matrix, that the remanence cannot be destroyed by any magnetic field. This serves as magnetic-field-proof memory. In the proposed polarized SANS experiments, we aim to study the structure and the magnetic properties of the shell-ferromagnet precipitates.

Principal Investigator: Professor Mehmet Acet
Experimenter: Mr Giordano Benacchio
Experimenter: Dr Diego Alba Venero
Local Contact: Dr Robert Dalgliesh

DOI: 10.5286/ISIS.E.RB1620444

ISIS Experiment Number: RB1620444

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 Mehmet Acet et al; (2016): Shell-ferromagnetism of nanoscaled Heusler precipitates , STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1620444

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