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

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

doi:10.1103/PhysRevLett.115.127205

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

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

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English (US)
Article number	127205
Journal	Physical Review Letters
Volume	115
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.115.127205
State	Published - Sep 17 2015

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Physics and Astronomy(all)

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10.1103/PhysRevLett.115.127205

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title = "Direct Observation of a Localized Magnetic Soliton in a Spin-Transfer Nanocontact",

abstract = "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.",

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AU - Macià, F.

AU - Bonetti, S.

AU - Kukreja, R.

AU - Ohldag, H.

AU - Kent, A. D.

PY - 2015/9/17

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N2 - 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.

AB - 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.

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

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