Scaling Behaviour and Beyond Equilibrium in the Hexagonal Manganites
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Date
2012
Publication Type
Journal Article
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yes
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Abstract
We show that the improper ferroelectric phase transition in the multiferroic hexagonal manganites displays appropriate symmetry-breaking characteristics for testing the Kibble-Zurek mechanism originally proposed to describe early-universe phase transitions. We present an analysis of the Kibble-Zurek theory of topological defect formation applied to the hexagonal manganites, discuss the conditions determining the range of cooling rates in which Kibble-Zurek behavior is expected, and show that recent literature data are consistent with our predictions. Finally, we explore experimentally the crossover out of the Kibble-Zurek regime and find a surprising reversal of the scaling behavior.
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published
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2 (4)
Pages / Article No.
41022
Publisher
American Physical Society
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03903 - Spaldin, Nicola A. / Spaldin, Nicola A.
03918 - Fiebig, Manfred / Fiebig, Manfred