ISIS Neutron and Muon Source Data Journal

Using neutron reflectometry to understand enhanced dynamic linewidth in a magnetic trilayer device

Abstract: We have studied the magnetic damping of CoFe/Ag/CoFe multilayer films using Ferromagnetic Resonance (FMR) spectroscopy. There is an anomalous linewidth enhancement, which oscillates with a period of around 1 nm as the Ag thickness is increased. One interpretation is related to the interlayer coupling which may be ferromagnetic or antiferromagnetic due to the well-known Ruderman-Kittel-Kasuya-Yosida (RKKY) mechanism. Theoretical studies predict such a dynamic exchange coupling across a non-magnetic spacer to affect the resonance linewidth; it is feasible that the enhanced damping found in CoFe/Ag/CoFe relies on the RKKY coupling. The aim of this experiment is to determine the RKKY coupling strength from depth-resolved vector magnetometry using polarised neutron reflectometry with polarisation analysis, to clarify interpretation of the anomalous linewidth behaviour in CoFe/Ag/CoFe.

Experimenter: Dr Aidan Hindmarch
Experimenter: Mr kalel Alsaeed
Local Contact: Dr Andrew Caruana
Experimenter: Dr Christy Kinane

DOI: 10.5286/ISIS.E.RB2210072

ISIS Experiment Number: RB2210072

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 Aidan Hindmarch et al; (2022): Using neutron reflectometry to understand enhanced dynamic linewidth in a magnetic trilayer device, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2210072

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