Change search
ReferencesLink to record
Permanent link

Direct link
Magnetic droplet solitons in orthogonal spin valves
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF. University of Gothenburg, Sweden.
KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.
Show others and affiliations
2015 (English)In: Low temperature physics (Woodbury, N.Y., Print), ISSN 1063-777X, E-ISSN 1090-6517, Vol. 41, no 10, 833-837 p.Article in journal (Refereed) PublishedText
Abstract [en]

We review the recent experimental advancements in the realization and understanding of magnetic droplet solitons generated by spin transfer torque in orthogonal nanocontact based spin torque nanooscillators (STNOs) fabricated on extended spin valves and spin valve nanowires. The magnetic droplets are detected and studied using the STNO microwave signal and its resistance, the latter both quasistatically and time-resolved. The droplet nucleation current is found to have a minimum at intermediate magnetic field strengths and the nature of the nucleation changes gradually from a single sharp step well above this field, mode-hopping around the minimum, and continuous at low fields. The mode-hopping and continuous transitions are ascribed to droplet drift instability and re-nucleation at different time scales, which is corroborated by time-resolved measurements. We argue that the use of tilted anisotropy fixed layers could reduce the nucleation current further, move the nucleation current minimum to lower fields, and potentially remove the need for an applied magnetic field altogether. Finally, evidence of an edge mode droplet in a nanowire is presented.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2015. Vol. 41, no 10, 833-837 p.
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-181140DOI: 10.1063/1.4932358ISI: 000364408900012ScopusID: 2-s2.0-84946554606OAI: diva2:900993

QC 20160205

Available from: 2016-02-05 Created: 2016-01-29 Last updated: 2016-02-05Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Chung, SunjaeEklund, AndersSani, Redjai SohrabÅkerman, Johan
By organisation
Material Physics, MFIntegrated Devices and CircuitsMaterials- and Nano Physics
In the same journal
Low temperature physics (Woodbury, N.Y., Print)
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 17 hits
ReferencesLink to record
Permanent link

Direct link