Journal article
Spin-glass-like ordering of the magnetic moments of interacting nanosized maghemite particles
Samples of interacting nanosized maghemite particles have been studied by Mössbauer spectroscopy and magnetization measurements. The apparent blocking temperatures obtained from Mössbauer spectroscopy and zero-field-cooled magnetization curves are nearly identical, but the values obtained from measurements of the decay of remanence are much lower.
These results are not in accordance with the Néel model for superparamagnetic relaxation, but can be explained by the formation of an ordered spin-glass-like state at low temperatures. At a critical temperature a transition to a superparamagnetic state takes place. By varying the average interparticle distance it is possible to change the ordering temperature.
Language: | English |
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Year: | 1995 |
Pages: | 287-294 |
ISSN: | 1550235x , 10980121 , 24699950 , 10953795 and 01631829 |
Types: | Journal article |
DOI: | 10.1103/PhysRevB.52.287 |
ORCIDs: | Hendriksen, Peter Vang and Linderoth, Søren |