965 lines
79 KiB
Text
965 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">Variation of the effective magnetization and the Lande g factor with thickness in thin Permalloy films</h1>
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<div class="nist-field__label">Published</div>
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<div class="nist-field__item"><time datetime="2003-07-07T12:00:00Z">July 7, 2003</time>
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<div class="nist-field__item"><span class="nist-author">John P. Nibarger</span>, <span class="nist-author">Radek Lopusnik</span>, <span class="nist-author">Thomas J. Silva</span>, <span class="nist-author">Zbigniew J. Celinski</span></div>
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<h3>Abstract</h3>
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We have simultaneously measured the Lande g factor, the effective magnetization, M<sub>eff</sub>, and the uniaxial anisotropy, H<sub>k</sub>, and the Gilbert damping parameter α, as a function of Permalloy film thickness from 2.5 to 50 nm. We used a pulsed inductive microwave magnetometer capable of generating dc bias fields of 35.2 kA/m (440 Oe). A significant decrease in g is observed with decreasing thickness below 10 nm. Also, M<sub>eff</sub> decreases with decreasing thickness consistent with a surface anisotropy constant of 0.196plus or minus}mJ/m<sup>2</sup>. The decrease in g can arise from the orbital motion of the electrons at the interface not being quenched by the crystal filed. We also compare our data to a model of an effective g factor suggesting that the decrease in g factor might also stem from the Ni-Fe interface with a Ta underlayer.
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<div class="nist-field__item">Applied Physics Letters</div>
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<div class="nist-field__label">Volume</div>
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<div class="nist-field__item">83</div>
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<h3 class="nist-field__label">Keywords</h3>
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<div class="nist-field__item">g-factor, kittel equation, magnetometer, pulsed inductive microwave, surface anisotropy</div>
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<article class="bibcite-reference">
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Nibarger, J.
|
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, Lopusnik, R.
|
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, Silva, T.
|
||
and Celinski, Z.
|
||
|
||
(2003),
|
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Variation of the effective magnetization and the Lande g factor with thickness in thin Permalloy films, Applied Physics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=31261
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(Accessed March 4, 2025)
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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 July 6, 2003, Updated October 12, 2021
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