Details
| Original language | English |
|---|---|
| Pages (from-to) | e764-e767 |
| Journal | Journal of Magnetism and Magnetic Materials |
| Volume | 316 |
| Issue number | 2 SPEC. ISS. |
| Early online date | 13 Mar 2007 |
| Publication status | Published - Sept 2007 |
Abstract
The magnetization enhancement in nanoscale mechanosynthesized MgFe2O4 is reported and is discussed in terms of a modified core-shell model, in which a competition between the effects of spin canting and site exchange of cations plays a decisive role. Because of the nearly random distribution of cations, the surface shell of nanoparticles exhibits an effective magnetic moment that is about 2 times larger than that of the particle core. The thickness of the "magnetically active" surface shell is calculated from the size-dependent magnetization measurements.
Keywords
- Cation disorder, Ferrimagnet, Fine particle, Mechanosynthesis, Spin canting
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Journal of Magnetism and Magnetic Materials, Vol. 316, No. 2 SPEC. ISS., 09.2007, p. e764-e767.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Magnetization enhancement in nanosized MgFe2O4 prepared by mechanosynthesis
AU - Šepelák, Vladimír
AU - Bergmann, Ingo
AU - Menzel, Dirk
AU - Feldhoff, Armin
AU - Heitjans, Paul
AU - Litterst, Fred J.
AU - Becker, Klaus Dieter
N1 - Funding Information: The work was supported by the Deutsche Forschungsgemeinschaft. Partial support by the Grant Agency of the Slovak Academy of Sciences (Grant 2/5146/25) and by the Alexander von Humboldt Foundation is acknowledged.
PY - 2007/9
Y1 - 2007/9
N2 - The magnetization enhancement in nanoscale mechanosynthesized MgFe2O4 is reported and is discussed in terms of a modified core-shell model, in which a competition between the effects of spin canting and site exchange of cations plays a decisive role. Because of the nearly random distribution of cations, the surface shell of nanoparticles exhibits an effective magnetic moment that is about 2 times larger than that of the particle core. The thickness of the "magnetically active" surface shell is calculated from the size-dependent magnetization measurements.
AB - The magnetization enhancement in nanoscale mechanosynthesized MgFe2O4 is reported and is discussed in terms of a modified core-shell model, in which a competition between the effects of spin canting and site exchange of cations plays a decisive role. Because of the nearly random distribution of cations, the surface shell of nanoparticles exhibits an effective magnetic moment that is about 2 times larger than that of the particle core. The thickness of the "magnetically active" surface shell is calculated from the size-dependent magnetization measurements.
KW - Cation disorder
KW - Ferrimagnet
KW - Fine particle
KW - Mechanosynthesis
KW - Spin canting
UR - http://www.scopus.com/inward/record.url?scp=34250357565&partnerID=8YFLogxK
U2 - 10.1016/j.jmmm.2007.03.087
DO - 10.1016/j.jmmm.2007.03.087
M3 - Article
AN - SCOPUS:34250357565
VL - 316
SP - e764-e767
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
IS - 2 SPEC. ISS.
ER -