Electronic Resource
Springer
The European physical journal
19 (1991), S. 271-273
ISSN:
1434-6079
Keywords:
75.30.Cr
;
75.50.Gg
;
75.60.Jp
;
76.30.Fc
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Ferromagnetic properties of ultrafine magnetite (Fe3O4) particles were examined by the ESR and the static magnetic susceptibility measurements. Ferromagnetic resonance became to be observed at the particle size larger than 3.4 nm. This finding suggests that the bulk-like ferromagnetic state cannot be formed in the particle less than 3.4 nm diameter for magnetite. Magnetic moments in such a small diameter region were also determined by the analyses of magnetization curves and were found to be smaller than those expected from the particle size. These findings from ESR and magnetization are discussed to clarify the nature of spin-ordering in a finite size sample.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01448309
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