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Conference Paper: Intrinsic phase shift between a spin torque oscillator and an alternating current

TitleIntrinsic phase shift between a spin torque oscillator and an alternating current
Authors
Issue Date2007
PublisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jsp
Citation
Journal Of Applied Physics, 2007, v. 101 n. 9 How to Cite?
AbstractWe report on a preferred phase shift Δ φ0 between a spin torque oscillator (STO) and an alternating current (Iac) injected at the intrinsic frequency (fSTO) of the STO. In the in-plane (IP) precession mode the STO adjusts to a state where its resistance (or voltage) lags Iac about a quarter of a wavelength [Δ φ0 = (87-94) °]. In the IP mode Δ φ0 increases somewhat with the direct current. As the precession changes into the out-of-plane (OOP) mode, Δ φ0 jumps by about 180°, i.e., the STO resistance now precedes Iac about a quarter of a wavelength (Δ φ0 =-86°). At the IP/OOP boundary, the alternating current mixes the two oscillation modes and both periodic and chaotic oscillations are observed. As a consequence of mixing, subharmonic terms appear in the STO signal. The intrinsic Δ φ0 will impact any circuit design based on STO technology and will, e.g., have direct consequences for phase locking in networks of serially connected STOs. © 2007 American Institute of Physics.
Persistent Identifierhttp://hdl.handle.net/10722/160470
ISSN
2015 Impact Factor: 2.101
2015 SCImago Journal Rankings: 0.603
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhou, Yen_HK
dc.contributor.authorPersson, Jen_HK
dc.contributor.authorÅkerman, Jen_HK
dc.date.accessioned2012-08-16T06:11:59Z-
dc.date.available2012-08-16T06:11:59Z-
dc.date.issued2007en_HK
dc.identifier.citationJournal Of Applied Physics, 2007, v. 101 n. 9en_US
dc.identifier.issn0021-8979en_HK
dc.identifier.urihttp://hdl.handle.net/10722/160470-
dc.description.abstractWe report on a preferred phase shift Δ φ0 between a spin torque oscillator (STO) and an alternating current (Iac) injected at the intrinsic frequency (fSTO) of the STO. In the in-plane (IP) precession mode the STO adjusts to a state where its resistance (or voltage) lags Iac about a quarter of a wavelength [Δ φ0 = (87-94) °]. In the IP mode Δ φ0 increases somewhat with the direct current. As the precession changes into the out-of-plane (OOP) mode, Δ φ0 jumps by about 180°, i.e., the STO resistance now precedes Iac about a quarter of a wavelength (Δ φ0 =-86°). At the IP/OOP boundary, the alternating current mixes the two oscillation modes and both periodic and chaotic oscillations are observed. As a consequence of mixing, subharmonic terms appear in the STO signal. The intrinsic Δ φ0 will impact any circuit design based on STO technology and will, e.g., have direct consequences for phase locking in networks of serially connected STOs. © 2007 American Institute of Physics.en_HK
dc.languageengen_US
dc.publisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jspen_HK
dc.relation.ispartofJournal of Applied Physicsen_HK
dc.titleIntrinsic phase shift between a spin torque oscillator and an alternating currenten_HK
dc.typeConference_Paperen_HK
dc.identifier.emailZhou, Y: yanzhou@hku.hken_HK
dc.identifier.authorityZhou, Y=rp01541en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1063/1.2710740en_HK
dc.identifier.scopuseid_2-s2.0-34248588611en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34248588611&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume101en_HK
dc.identifier.issue9en_HK
dc.identifier.isiWOS:000246567900121-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridZhou, Y=51360911500en_HK
dc.identifier.scopusauthoridPersson, J=25031767000en_HK
dc.identifier.scopusauthoridÅkerman, J=7003585708en_HK

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