Magnetic properties and rotational hysteresis of Fe3O4 and γ-Fe2O3 particles ∼ 250 nm in diameter
Identifieur interne : 002795 ( Main/Merge ); précédent : 002794; suivant : 002796Magnetic properties and rotational hysteresis of Fe3O4 and γ-Fe2O3 particles ∼ 250 nm in diameter
Auteurs : E. Schmidbauer [Allemagne] ; R. Keller [Allemagne]Source :
- Journal of Magnetism and Magnetic Materials [ 0304-8853 ] ; 1995.
Abstract
We report the magnetic properties for dispersed, spherical Fe3O4 and γ-Fe2O3 particles ∼ 250 nm in diameter in the temperature range T = 4.2–294 K. For Fe3O4, hysteresis properties show anomalies at 130 K, where the magnetocrystalline anisotropy constant K1 vanishes; the ratio Hc/Is (Hc = coercive force, Is = saturation magnetization) follows a linear relationship with K1/Is2 between 130 and 294 K. Below the Verwey transition temperature TV (∼ 120 K, the hysteresis properties depend on whether the sample is cooled in a strong magnetic field or in zero field; no magnetic anomalies were observed for γ-Fe2O3 particles, generated by oxidizing the Fe3O4 particles under study. The rotational hysteresis integral at 294 K is ∼ 0.7 for both compounds, pointing to a coherent-type magnetization reversal for assumed uniaxial single-domain particles (SDPs); however, the reduced saturation remanence is only ∼ 0.2, far below that for SDPs. Possible models for the particle magnetization modes are discussed.
Url:
DOI: 10.1016/0304-8853(95)00446-7
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 002313
- to stream Istex, to step Curation: 002156
- to stream Istex, to step Checkpoint: 001A62
Links to Exploration step
ISTEX:0F78B001905CEEC6609F0887E8818AA6BDE503B0Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title>Magnetic properties and rotational hysteresis of Fe3O4 and γ-Fe2O3 particles ∼ 250 nm in diameter</title>
<author><name sortKey="Schmidbauer, E" sort="Schmidbauer, E" uniqKey="Schmidbauer E" first="E." last="Schmidbauer">E. Schmidbauer</name>
</author>
<author><name sortKey="Keller, R" sort="Keller, R" uniqKey="Keller R" first="R." last="Keller">R. Keller</name>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">ISTEX</idno>
<idno type="RBID">ISTEX:0F78B001905CEEC6609F0887E8818AA6BDE503B0</idno>
<date when="1996" year="1996">1996</date>
<idno type="doi">10.1016/0304-8853(95)00446-7</idno>
<idno type="url">https://api.istex.fr/document/0F78B001905CEEC6609F0887E8818AA6BDE503B0/fulltext/pdf</idno>
<idno type="wicri:Area/Istex/Corpus">002313</idno>
<idno type="wicri:Area/Istex/Curation">002156</idno>
<idno type="wicri:Area/Istex/Checkpoint">001A62</idno>
<idno type="wicri:doubleKey">0304-8853:1996:Schmidbauer E:magnetic:properties:and</idno>
<idno type="wicri:Area/Main/Merge">002795</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title level="a">Magnetic properties and rotational hysteresis of Fe3O4 and γ-Fe2O3 particles ∼ 250 nm in diameter</title>
<author><name sortKey="Schmidbauer, E" sort="Schmidbauer, E" uniqKey="Schmidbauer E" first="E." last="Schmidbauer">E. Schmidbauer</name>
<affiliation wicri:level="4"><country xml:lang="fr">Allemagne</country>
<wicri:regionArea>Institut für Allgemeine und Angewandte Geophysik der Universität München, Theresienstr. 41, D-80333 München</wicri:regionArea>
<placeName><region type="land" nuts="1">Bavière</region>
<region type="district" nuts="2">District de Haute-Bavière</region>
<settlement type="city">Munich</settlement>
</placeName>
<orgName type="university">Université Louis-et-Maximilien de Munich</orgName>
</affiliation>
</author>
<author><name sortKey="Keller, R" sort="Keller, R" uniqKey="Keller R" first="R." last="Keller">R. Keller</name>
<affiliation wicri:level="4"><country xml:lang="fr">Allemagne</country>
<wicri:regionArea>Institut für Allgemeine und Angewandte Geophysik der Universität München, Theresienstr. 41, D-80333 München</wicri:regionArea>
<placeName><region type="land" nuts="1">Bavière</region>
<region type="district" nuts="2">District de Haute-Bavière</region>
<settlement type="city">Munich</settlement>
</placeName>
<orgName type="university">Université Louis-et-Maximilien de Munich</orgName>
</affiliation>
</author>
</analytic>
<monogr></monogr>
<series><title level="j">Journal of Magnetism and Magnetic Materials</title>
<title level="j" type="abbrev">MAGMA</title>
<idno type="ISSN">0304-8853</idno>
<imprint><publisher>ELSEVIER</publisher>
<date type="published" when="1995">1995</date>
<biblScope unit="volume">152</biblScope>
<biblScope unit="issue">1–2</biblScope>
<biblScope unit="page" from="99">99</biblScope>
<biblScope unit="page" to="108">108</biblScope>
</imprint>
<idno type="ISSN">0304-8853</idno>
</series>
<idno type="istex">0F78B001905CEEC6609F0887E8818AA6BDE503B0</idno>
<idno type="DOI">10.1016/0304-8853(95)00446-7</idno>
<idno type="PII">0304-8853(95)00446-7</idno>
</biblStruct>
</sourceDesc>
<seriesStmt><idno type="ISSN">0304-8853</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass></textClass>
<langUsage><language ident="en">en</language>
</langUsage>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">We report the magnetic properties for dispersed, spherical Fe3O4 and γ-Fe2O3 particles ∼ 250 nm in diameter in the temperature range T = 4.2–294 K. For Fe3O4, hysteresis properties show anomalies at 130 K, where the magnetocrystalline anisotropy constant K1 vanishes; the ratio Hc/Is (Hc = coercive force, Is = saturation magnetization) follows a linear relationship with K1/Is2 between 130 and 294 K. Below the Verwey transition temperature TV (∼ 120 K, the hysteresis properties depend on whether the sample is cooled in a strong magnetic field or in zero field; no magnetic anomalies were observed for γ-Fe2O3 particles, generated by oxidizing the Fe3O4 particles under study. The rotational hysteresis integral at 294 K is ∼ 0.7 for both compounds, pointing to a coherent-type magnetization reversal for assumed uniaxial single-domain particles (SDPs); however, the reduced saturation remanence is only ∼ 0.2, far below that for SDPs. Possible models for the particle magnetization modes are discussed.</div>
</front>
</TEI>
</record>
Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Ticri/CIDE/explor/OcrV1/Data/Main/Merge
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 002795 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Merge/biblio.hfd -nk 002795 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien |wiki= Ticri/CIDE |area= OcrV1 |flux= Main |étape= Merge |type= RBID |clé= ISTEX:0F78B001905CEEC6609F0887E8818AA6BDE503B0 |texte= Magnetic properties and rotational hysteresis of Fe3O4 and γ-Fe2O3 particles ∼ 250 nm in diameter }}
![]() | This area was generated with Dilib version V0.6.32. | ![]() |