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Chemical disorder-induced magnetism in FeSi2 nanoparticles.
- Source :
-
Applied Physics Letters . 12/17/2007, Vol. 91 Issue 25, p251907. 3p. 5 Graphs. - Publication Year :
- 2007
-
Abstract
- Iron disilicide in a bulk form is practically nonmagnetic. In contrast, nanoparticles of FeSi2 exhibit superparamagnetism with blocking temperatures ranging from 8 K (15 nm) to 34 K (55 nm). Their relatively low saturation magnetization suggests that the magnetic behavior is associated with only a small fraction of Fe ions, which have a sufficient number of other Fe as nearest neighbors. The chemical disorder is presumably induced in the formation of nanoparticles. A spin glass-type anomaly below 10 K observed in specific heat data gives a further evidence for the compositional heterogeneity. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 91
- Issue :
- 25
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 28113547
- Full Text :
- https://doi.org/10.1063/1.2825467