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Micromagnetic study of switching boundary of a spin torque nanodevice
KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
2011 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 98, no 10, 102501- p.Article in journal (Refereed) Published
Abstract [en]

We report on a numerical study of the micromagnetic switching process of a nanostructured spin torque device. We show that incoherent spin waves can be excited over a wide range of current and field even at zero temperature. These large amplitude, incoherent, and nonzero k spin wave modes are shown to alter the switching phase boundary from that calculated within a macrospin model. The presence of telegraphic transitions between different spin wave modes may also contribute to the so-called back-hopping phenomenon where the switching probability varies nonmonotonically with increasing bias current.

Place, publisher, year, edition, pages
2011. Vol. 98, no 10, 102501- p.
Keyword [en]
MAGNETIC TUNNEL-JUNCTIONS, ANGULAR-MOMENTUM TRANSFER, REMAGNETIZATION PROCESSES, POLARIZED CURRENT, DRIVEN, NANOMAGNET, DEVICES, MAGNETORESISTANCE, SIMULATIONS, EMISSION
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-32031DOI: 10.1063/1.3561753ISI: 000288277200040Scopus ID: 2-s2.0-79952647613OAI: oai:DiVA.org:kth-32031DiVA: diva2:408620
Funder
Swedish Research CouncilKnut and Alice Wallenberg Foundation
Note
QC 20110405Available from: 2011-04-05 Created: 2011-04-04 Last updated: 2017-12-11Bibliographically approved

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