ISIS Neutron and Muon Source Data Journal

Investigating the breakdown of spring-exchange coupling at low temperature on the atomic scale

Abstract: Strong magnets with a high energy product are vital when optimizing the efficiency in the electricindustry. This can be achieved by making spring-exchange coupled magnets. Samples have beenmade by partly reducing CoFe2O4 to CoFe2 creating easily a spring-exchange coupled magnetswith 10 times increase in energy product compared to pure CoFe2O4. The spring-exchange is amicroscopic short ranged effect in which the spins in the soft phase gets aligned by the field fromthe hard phase. The coupling increases the atomic magnetic moments which enhances the energy product. However, the coupling breaks down at low temperature so we propose to do temperature scans while collecting powder diffraction data in order to investigate the spring-exchange couple mechanism on an atomic level.

Principal Investigator: Dr Mogens Christensen
Experimenter: Mr Jakob Voldum Ahlburg
Experimenter: Mr Frederik Gjørup
Experimenter: Mr Tommy Kessler
Experimenter: Mr Mathias Mørch
Local Contact: Professor Paul Henry

DOI: 10.5286/ISIS.E.RB1820504

ISIS Experiment Number: RB1820504

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 Mogens Christensen et al; (2018): Investigating the breakdown of spring-exchange coupling at low temperature on the atomic scale, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1820504

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