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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 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° at the contact center. The results strongly suggest that we have observed a localized magnetic soliton.

preprint2015arXivOpen access
D. BackesF. MaciàS. BonettiR. KukrejaH. OhldagA. D. Kent
cond-mat.mes-hallcond-mat.mtrl-sci
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Open access6 authors2 topics
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D. BackesF. MaciàS. BonettiR. KukrejaH. OhldagA. D. Kent

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