In situ ferromagnetic resonance capability on a polarized neutron reflectometry beamline

• Published in: Journal of applied crystallography 2018-02, Vol.51 (1), p.9-16
• Main Authors: Kostylev, Mikhail, Causer, Grace L., Lambert, Charles-Henri, Schefer, Thomas, Weiss, Charles, Callori, Sara J., Salahuddin, Sayeef, Wang, Xiaolin L., Klose, Frank
• Format: Article
• Language: English
• Subjects: Crystallography; Ferromagnetic materials; Ferromagnetic resonance; hydrogen sensing materials; Instrumentation; magnetic anisotropy; magnetic depth profiling; magnetization dynamics; microwave devices; Neutron scattering; Neutrons; Reflectometry; Resonance; Thermodynamics; Thin films
• ISSN: 1600-5767; 0021-8898; 1600-5767
• DOI: 10.1107/S1600576718000535

This article describes a novel approach which allows for the mutual determination of a ferromagnetic thin film's static and dynamic magnetic behaviours in the presence of an external thermodynamic stimulus. Using a combination of polarized neutron reflectometry (PNR) and ferromagnetic resonance (FMR) techniques, it is shown that information such as magnetic depth profiles and magnetization dynamics can be obtained for a ferromagnetic film in both transient and static states in the presence of a hydrogen gas atmosphere. Presented here are the proposed scheme, the instrumentation concept and the first experimental results obtained from implementing a custom‐made PNR with an in situ FMR sample chamber on the PLATYPUS time‐of‐flight reflectometer beamline at the Australian Centre for Neutron Scattering (ANSTO). The design of a polarized neutron reflectometry sample environment capable of simultaneously measuring the ferromagnetic resonance response of a magnetic thin film is presented.