WFRF:(Singh Gurvinder)
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Particle size-dependent superspin glass behavior in random compacts of monodisperse maghemite nanoparticles
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- Andersson, Mikael Svante (author)
- Uppsala universitet,Industriell teknik
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- Mathieu, Roland (author)
- Uppsala universitet,Fasta tillståndets fysik
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- Normile, Peter S. (author)
- Univ Castilla La Mancha, IRICA, E-13071 Ciudad Real, Spain.;Univ Castilla La Mancha, Dept Fis Aplicada, E-13071 Ciudad Real, Spain.
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- (creator_code:org_t)
- 2016-04-20
- 2016
- English.
- In: Materials Research Express. - : IOP Publishing. - 2053-1591. ; 3:4
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Dense random assemblies made from highly monodisperse gamma-Fe2O3 nanoparticles with sizes ranging from 6.2 to 11.5 nm have been investigated by DC and AC magnetometry. It is found that all assemblies undergo superspin glass phase transitions. The superspin glass phase transition temperature is strongly dependent on the particle size and the nature of the interparticle interaction. However the transition from superparamagnet to superspin glass, as evidenced by the shape of the ac-susceptibility curves and the dynamic critical exponents associated with the transition, is similar in all systems.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Keyword
- magnetic nanoparticles
- maghemite
- superspin glass
- phase transition
Publication and Content Type
- ref (subject category)
- art (subject category)
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