Article: Multiple synchronization attractors of serially connected spin-torque nanooscillators

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Title	Multiple synchronization attractors of serially connected spin-torque nanooscillators
Authors	Li, D3 Zhou, Y2 Hu, B1 Åkerman, J4 Zhou, C3
Issue Date	2012
Publisher	American Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation	Physical Review B - Condensed Matter And Materials Physics, 2012, v. 86 n. 1, article no. 014418 [How to Cite?] DOI: http://dx.doi.org/10.1103/PhysRevB.86.014418
Abstract	Spin-torque nanooscillators (STNOs), which have both the common properties of nanosized oscillators (small size, tunable operating frequency) and some particular ones (wide operating range, easy on-chip integration, etc.), have received a great deal of attention due to their high potential in applications. Yet synchronization of serially connected STNOs has been considered essential for applications. In this paper, we present findings concerning the following properties of synchronized serially connected STNOs: (i) multiple synchronization attractors coexist, and the attracting basins are entangled in a complicated manner; (ii) these attractors have different synchronized frequencies and output powers; and (iii) switching among these attractors can be induced by a small noise, which causes a resonance peak in the power spectra to vanish. These characteristics can be understood using saddle-node bifurcations and have direct impact on laboratory experiments and the potential applications of STNO-based devices. © 2012 American Physical Society.
ISSN	1098-0121 2011 Impact Factor: 3.691 2011 SCImago Journal Rankings: 0.268
DOI	http://dx.doi.org/10.1103/PhysRevB.86.014418
References	References in Scopus

DC Field	Value
dc.contributor.author	Li, D
dc.contributor.author	Zhou, Y
dc.contributor.author	Hu, B
dc.contributor.author	Åkerman, J
dc.contributor.author	Zhou, C
dc.date.accessioned	2012-08-16T05:56:45Z
dc.date.available	2012-08-16T05:56:45Z
dc.date.issued	2012
dc.description.abstract	Spin-torque nanooscillators (STNOs), which have both the common properties of nanosized oscillators (small size, tunable operating frequency) and some particular ones (wide operating range, easy on-chip integration, etc.), have received a great deal of attention due to their high potential in applications. Yet synchronization of serially connected STNOs has been considered essential for applications. In this paper, we present findings concerning the following properties of synchronized serially connected STNOs: (i) multiple synchronization attractors coexist, and the attracting basins are entangled in a complicated manner; (ii) these attractors have different synchronized frequencies and output powers; and (iii) switching among these attractors can be induced by a small noise, which causes a resonance peak in the power spectra to vanish. These characteristics can be understood using saddle-node bifurcations and have direct impact on laboratory experiments and the potential applications of STNO-based devices. © 2012 American Physical Society.
dc.description.nature	published_or_final_version
dc.identifier.citation	Physical Review B - Condensed Matter And Materials Physics, 2012, v. 86 n. 1, article no. 014418 [How to Cite?] DOI: http://dx.doi.org/10.1103/PhysRevB.86.014418
dc.identifier.doi	http://dx.doi.org/10.1103/PhysRevB.86.014418
dc.identifier.hkuros	202148
dc.identifier.hkuros	211027
dc.identifier.issn	1098-0121 2011 Impact Factor: 3.691 2011 SCImago Journal Rankings: 0.268
dc.identifier.issue	1, article no. 014418
dc.identifier.scopus	eid_2-s2.0-84864491944
dc.identifier.uri	http://hdl.handle.net/10722/159802
dc.identifier.volume	86
dc.language	eng
dc.publisher	American Physical Society. The Journal's web site is located at http://prb.aps.org/
dc.publisher.place	United States
dc.relation.ispartof	Physical Review B - Condensed Matter and Materials Physics
dc.relation.references	References in Scopus
dc.rights	Creative Commons: Attribution 3.0 Hong Kong License
dc.title	Multiple synchronization attractors of serially connected spin-torque nanooscillators
dc.type	Article

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Author Affiliations

University of Houston
The University of Hong Kong
Hong Kong Baptist University
Göteborgs Universitet