Real-time Hall-effect detection of current-induced magnetization dynamics in ferrimagnets
Abstract
Measurements of the transverse Hall resistance are widely used to investigate electron transport, magnetization phenomena, and topological quantum states. Owing to the difficulty of probing transient changes of the transverse resistance, the vast majority of Hall effect experiments are carried out in stationary conditions using either dc or ac. Here we present an approach to perform time-resolved measurements of the transient Hall resistance during current-pulse injection with sub-nanosecond temporal resolution. We apply this technique to investigate in real-time the magnetization reversal caused by spin-orbit torques in ferrimagnetic GdFeCo dots. Single-shot Hall effect measurements show that the current-induced switching of GdFeCo is widely distributed in time and characterized by significant activation delays, which limit the total switching speed despite the high domain-wall velocity typical of ferrimagnets. Our method applies to a broad range of current-induced phenomena and can be combined with non-electrical excitations to perform pump-probe Hall effect measurements. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000467931Publication status
publishedExternal links
Journal / series
Nature CommunicationsVolume
Pages / Article No.
Publisher
NatureOrganisational unit
03986 - Gambardella, Pietro / Gambardella, Pietro
Funding
172775 - Spin-orbitronics in ferromagnets and antiferromagnets (SNF)
179944 - Antiferromagnetic materials for magneto- and opto-electronics (SNF)
Related publications and datasets
Is supplemented by: http://hdl.handle.net/20.500.11850/463207
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