Dynamics of random dipoles : chaos {\it vs} ferromagnetism

Abstract

The microcanonical dynamics of an ensemble of random magnetic dipoles in a needle has been investigated. Analyzing magnetic reversal times, a transition between a chaotic paramagnetic phase and an integrable ferromagnetic phase has been numerically found. In particular, a simple criterium for transition has been formulated. Close to the transition point the statistics of average magnetic reversal times and fluctuations have been studied and critical exponents numerically given.

To appear on Journal of Statistical Mechanics

References in corpus (5)

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• Phase space gaps and ergodicity breaking in systems with long range interactions
• Long-Range Effects in Layered Spin Structures
• Spin Glass Transition at Nonzero Temperature in a Disordered Dipolar Ising System: The Case of LiHoxY{1-x}F4
• Magnetic Reversal Time in Open Long Range Systems