Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Time-domain stability of parametric synchronization in a spin-torque nano-oscillator based on a magnetic tunnel junction
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik. Univ Gothenburg, Sweden.ORCID-id: 0000-0002-3513-6608
Vise andre og tillknytning
2017 (engelsk)Inngår i: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 96, nr 2, artikkel-id 024427Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We report on time-domain stability of the parametric synchronization in a spin-torque nano-oscillator (STNO) based on a magnetic tunnel junction. Time-domain measurements of the instantaneous frequency (f(i)) of a parametrically synchronized STNO showrandom short-term unlocking of the STNO signal for low injected radio-frequency (RF) power, which cannot be revealed in time-averaged frequency domain measurements. Macrospin simulations reproduce the experimental results and reveal that the random unlocking during synchronization is driven by thermal fluctuations. We show that by using a high injected RF power, random unlocking of the STNO can be avoided. However, a perfect synchronization characterized by complete suppression of phase noise, so-called phase noise squeezing, can be obtained only at a significantly higher RF power. Our macrospin simulations suggest that a lower temperature and a higher positive ratio of the fieldlike torque to the spin transfer torque reduce the threshold RF power required for phase noise squeezing under parametric synchronization.

sted, utgiver, år, opplag, sider
American Physical Society, 2017. Vol. 96, nr 2, artikkel-id 024427
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-211602DOI: 10.1103/PhysRevB.96.024427ISI: 000405876300005Scopus ID: 2-s2.0-85026378443OAI: oai:DiVA.org:kth-211602DiVA, id: diva2:1131446
Forskningsfinansiär
Swedish Foundation for Strategic Research Swedish Research Council
Merknad

QC 20170814

Tilgjengelig fra: 2017-08-14 Laget: 2017-08-14 Sist oppdatert: 2017-11-29bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekstScopus

Personposter BETA

Åkerman, Johan

Søk i DiVA

Av forfatter/redaktør
Åkerman, Johan
Av organisasjonen
I samme tidsskrift
Physical Review B

Søk utenfor DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 15 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf