Direct Observation of Large Amplitude Spin Excitations Localized in a Spin-Transfer Nanocontact

We report the direct observation of large amplitude spin-excitations localized in a spin-transfer nanocontact using scanning transmission x-ray microscopy. Experiments were conducted using a nanocontact to an ultrathin ferromagnetic multilayer with perpendicular magnetic anisotropy. Element resolved...

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Bibliographic Details
Published in:arXiv.org 2015-04
Main Authors: Backes, D, Macià, F, Bonetti, S, Kukreja, R, Ohldag, H, Kent, A D
Format: Article
Language:English
Subjects:
Amplitudes
Contact angle
Dichroism
Electrons
Excitation
Ferromagnetism
Magnetic anisotropy
Multilayers
Threshold currents
X ray microscopy
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Summary:We report the direct observation of large amplitude spin-excitations localized in a spin-transfer nanocontact using scanning transmission x-ray microscopy. Experiments were conducted using a nanocontact to an ultrathin ferromagnetic multilayer with perpendicular magnetic anisotropy. Element resolved x-ray magnetic circular dichroism images show an abrupt onset of spin excitations at a threshold current that are localized beneath the nanocontact, with average spin precession cone angles of 25{\deg} at the contact center. The results strongly suggest that we have observed a localized magnetic soliton.
ISSN:2331-8422
DOI:10.48550/arxiv.1504.00488