968 lines
79 KiB
Text
968 lines
79 KiB
Text
<!DOCTYPE html>
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<html lang="en" dir="ltr" prefix="content: http://purl.org/rss/1.0/modules/content/ dc: http://purl.org/dc/terms/ foaf: http://xmlns.com/foaf/0.1/ og: http://ogp.me/ns# rdfs: http://www.w3.org/2000/01/rdf-schema# schema: http://schema.org/ sioc: http://rdfs.org/sioc/ns# sioct: http://rdfs.org/sioc/types# skos: http://www.w3.org/2004/02/skos/core# xsd: http://www.w3.org/2001/XMLSchema# ">
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<h1 class="nist-page__title">Frequency modulation of spin-transfer oscillators</h1>
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<div class="nist-field__item"><time datetime="2005-02-18T12:00:00Z">February 18, 2005</time>
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<div class="nist-field__item"><span class="nist-author">Matthew Pufall</span>, <span class="nist-author">William Rippard</span>, <span class="nist-author">Shehzaad F. Kaka</span>, <span class="nist-author">Thomas J. Silva</span>, <span class="nist-author">Stephen E. Russek</span></div>
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<h3>Abstract</h3>
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Spin-polarized dc electric current flowing into a magnetic layer can induce precession of the magnetization at a frequency that depends on current. We show that addition of an ac current to this dc bias current results in a frequency modulated (FM) spectral output, generating sidebands spaced at the modulation frequency. The sideband amplitudes and shift of the center frequency with drive amplitude are in good agreement with a nonlinear FM model that takes into account the nonlinear frequency-current relation generally induced by spin transfer. Single-domain simulations show that ac current modulates the cone angle of the magnetization precession, in turn modulating the frequency via the demagnetizing field. These results are promising for communications and signal processing applications of spin-transfer oscillators.
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<div class="nist-field__item">Applied Physics Letters</div>
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<h3 class="nist-field__label">Keywords</h3>
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<div class="nist-field__item">frequency modulation, magnetic media, nonlinear, precession, spin-transfer oscillator</div>
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Pufall, M.
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, Rippard, W.
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, Kaka, S.
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, Silva, T.
|
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(2005),
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Frequency modulation of spin-transfer oscillators, Applied Physics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=31817
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If you have any questions about this publication or are having problems accessing it, please contact <a href="mailto:reflib@nist.gov" class="usa-link">reflib@nist.gov</a>.
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Created February 17, 2005, Updated October 12, 2021
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