Perpendicular spin torque promotes synchronization of magnetic tunnel junction based spin torque oscillators
2009 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 94, no 11, 112503- p.Article in journal (Refereed) Published
We study how the perpendicular spin transfer torque term (b(j)), present in magnetic tunneling junctions (MTJs), affects the synchronization of serially connected MTJ-based spin torque oscillators (MTJ-STOs). We find that b(j) modifies the intrinsic preferred I-V phase shift in single MTJ-STO in such a way that serially connected MTJ-STOs synchronize much more readily without the need for additional circuitry to change the I-V phase. This result strongly suggests that synchronization of serially connected MTJ-STOs should be significantly more straightforward than the previously attempted serial synchronization of giant magnetoresistance based STOs (GMR-STOs).
Place, publisher, year, edition, pages
2009. Vol. 94, no 11, 112503- p.
boron alloys, cobalt alloys, iron alloys, magnetic microwave devices, magnetic thin films, microwave oscillators, tunnelling magnetoresistance, phase-locking, driven, dependence, emission, devices
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:kth:diva-18260DOI: 10.1063/1.3100299ISI: 000264380300047ScopusID: 2-s2.0-63049098851OAI: oai:DiVA.org:kth-18260DiVA: diva2:336306
QC 201005252010-08-052010-08-052011-01-17Bibliographically approved