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Direct Observation of a Localized Magnetic Soliton in a Spin-Transfer Nanocontact

Backes, D ; Macià, F ; Bonetti, S ; Kukreja, R ; Ohldag, H ; Kent, A D

Physical review letters, 2015-09, Vol.115 (12), p.127205-127205, Article 127205 [Periódico revisado por pares]

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Título:
Direct Observation of a Localized Magnetic Soliton in a Spin-Transfer Nanocontact
Autor: Backes, D ; Macià, F ; Bonetti, S ; Kukreja, R ; Ohldag, H ; Kent, A D
Assuntos: Asymptotic properties ; Contact ; Dichroism ; Excitation ; Ferromagnetism ; Mathematical models ; Nanostructure ; Solitons
É parte de: Physical review letters, 2015-09, Vol.115 (12), p.127205-127205, Article 127205
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
USDOE
AC02-98CH10886; AC02-76SF00515; MAT2011-23698; W911NF-08-1-0317
Descrição: We report the direct observation of a localized magnetic soliton in a spin-transfer nanocontact using scanning transmission x-ray microscopy. Experiments are conducted on a lithographically defined 150 nm diameter nanocontact to an ultrathin ferromagnetic multilayer with perpendicular magnetic anisotropy. Element-resolved x-ray magnetic circular dichroism images show an abrupt onset of a magnetic soliton excitation localized beneath the nanocontact at a threshold current. However, the amplitude of the excitation ≃25° at the contact center is far less than that predicted (⪅180°), showing that the spin dynamics is not described by existing models.
Editor: United States: American Physical Society
Idioma: Inglês

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