ISIS Neutron and Muon Source Data Journal

Temperature control of enhanced magnetic damping in ferrimagnetic Ni/Tb bilayers

Abstract: Future magnonic devices which manipulate spin wave excitations as opposed to charge currents, offer a pathway towards novel, high performance and low-energy magnetic-logic devices. Here, magnetic damping is a crucially important parameter, controlling energy dissipation within the system. There is also emerging interest in the use of rare earth-transition metal (RE-TM) alloys and multilayer systems due to the ferrimagnetic nature of these systems, resulting in a plethora of useful phenomena, including ultrafast, energy efficient switching. While the mechanism for damping when interfacing magnetic thin films with conventional large spin orbit coupling materials such as Pt is well understood, it is far from clear within a RE-TM multilayer system, where large damping enhancements may arise from coupling between the elements. In this proposal, we aim to examine the coupling of NiFe/Tb bilayers through Polarised Neutron Reflectivity (PNR) as a function of temperature. Temperature is a well established parameter for tuning the behaviour of RE elements within RE/TM systems, and the use of a depth sensitive probe such as PNR will allow us to determine the strength and thickness limits of any magnetic coupling within the system and the role it plays in enhancing the damping. Additionally, looking at this as a function of temperature will allow us to better understand the role of the magnetisation within the Tb layer, allowing us to further the capabilities of future devices.

Principal Investigator: Dr Emma Gilroy
Experimenter: Dr Christy Kinane
Local Contact: Dr Andrew Caruana
Experimenter: Dr Tom Hayward
Experimenter: Dr Charles Swindells

DOI: 10.5286/ISIS.E.RB2420264

ISIS Experiment Number: RB2420264

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
Select the data format above to find out more about it.

Data Citation

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

For Example:
Dr Emma Gilroy et al; (2024): Temperature control of enhanced magnetic damping in ferrimagnetic Ni/Tb bilayers, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2420264

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