Volume 102, Number 6, June 2013
|Number of page(s)||3|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||01 July 2013|
Phase transition in a super superspin glass
1 Department of Engineering Sciences, Uppsala University - Box 534, SE-751 21 Uppsala, Sweden, EU
2 Instituto Regional de Investigación Científica Aplicada (IRICA) and Departamento de Física Aplicada, Universidad de Castilla-La Mancha - 13071 Ciudad Real, Spain, EU
3 Departamento de Física Aplicada, Universidad de Castilla-La Mancha - 13071 Ciudad Real, Spain, EU
4 Institute of Bioengineering and Nanotechnology - 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
Received: 12 March 2013
Accepted: 2 June 2013
We here confirm the occurrence of spin glass phase transition and extract estimates of associated critical exponents of a highly monodisperse and densely compacted system of bare maghemite nanoparticles. This system has earlier been found to behave like an archetypal spin glass, with, e.g., a sharp transition from paramagnetic to non-equilibrium behavior, suggesting that this system undergoes a spin glass phase transition at a relatively high temperature, Tg ∼ 140 K.
PACS: 75.50.Lk – Spin glasses and other random magnets / 75.10.Nr – Spin-glass and other random models / 75.40.Cx – Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)
© EPLA, 2013
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