Micromagnetic study of switching boundary of a spin torque nanodevice
2011 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 98, no 10, 102501- p.Article in journal (Refereed) Published
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.
MAGNETIC TUNNEL-JUNCTIONS, ANGULAR-MOMENTUM TRANSFER, REMAGNETIZATION PROCESSES, POLARIZED CURRENT, DRIVEN, NANOMAGNET, DEVICES, MAGNETORESISTANCE, SIMULATIONS, EMISSION
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:kth:diva-32031DOI: 10.1063/1.3561753ISI: 000288277200040ScopusID: 2-s2.0-79952647613OAI: oai:DiVA.org:kth-32031DiVA: diva2:408620
FunderSwedish Research CouncilKnut and Alice Wallenberg Foundation
QC 201104052011-04-052011-04-042011-04-05Bibliographically approved