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Capacitance Effect on Microwave Power Spectra of Spin-Torque Oscillator With Thermal Noise
KTH, School of Information and Communication Technology (ICT), Material Physics, Material Physics, MF.
KTH, School of Information and Communication Technology (ICT), Material Physics, Material Physics, MF.
2009 (English)In: IEEE transactions on magnetics, ISSN 0018-9464, E-ISSN 1941-0069, Vol. 45, no 6, 2773-2776 p.Article in journal (Refereed) Published
Abstract [en]

A macro-spin simulation has been carried out to study the thermal stability of a spin-torque oscillator (STO) connected in parallel with a capacitance. To study the impact of realistic thermal fluctuation on an STO, a stochastic magnetic field vector is added into the Landau-Lifshitz-Gilbert-Slonczewski (LLGS) equation. From the numerical solution, it is found that the addition of capacitance positively influences the thermal stability of the system, and can improve the quality factor of the microwave power spectrum even in the presence of thermal fluctuation. The results of I-V phase shift under different conditions suggest that there may exist an optimum capacitance for which the thermal stability of the system can be most enhanced.

Place, publisher, year, edition, pages
2009. Vol. 45, no 6, 2773-2776 p.
Keyword [en]
Macrospin model, spin-torque oscillator, thermal fluctuation
National Category
Other Engineering and Technologies
Identifiers
URN: urn:nbn:se:kth:diva-30845DOI: 10.1109/TMAG.2009.2020556ISI: 000266329800114Scopus ID: 2-s2.0-66549096972OAI: oai:DiVA.org:kth-30845DiVA: diva2:402503
Conference
Asian Magnetics Conference (AMC 2008) Korean Magnet Soc, Busan, SOUTH KOREA, DEC 10-13, 2008
Note
QC 20110308Available from: 2011-03-08 Created: 2011-03-04 Last updated: 2017-12-11Bibliographically approved

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