Spin-torque driven excitations and hysteresis in magnetic point contacts
2006 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 99, no 8, 08G503-1-08G503-3 p.Article in journal (Refereed) Published
Magnetic multilayers are known to exhibit magnetization excitations, which are due to exchange fields produced by densely distributed spin-polarized electron currents. We report an observation of such excitations as well as hysteretic spin states produced by unpolarized currents in point contacts to single ferromagnetic layers. By measuring diffusive and ballistic contacts for various material combinations, we investigate the microscopic mechanism of the single interface spin-torque effect and discuss the possible origin of the observed hysteresis.
Place, publisher, year, edition, pages
2006. Vol. 99, no 8, 08G503-1-08G503-3 p.
Electric excitation; Electrons; Ferromagnetism; Magnetization; Microscopes; Multilayers; Ballistic contacts; Ferromagnetic layers; Magnetic multilayers; Magnetization excitations
IdentifiersURN: urn:nbn:se:kth:diva-8677DOI: 10.1063/1.2159410ISI: 000237404200368ScopusID: 2-s2.0-33646747195OAI: oai:DiVA.org:kth-8677DiVA: diva2:14061
QC 201008182008-06-042008-06-042010-08-18Bibliographically approved