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Kinetic pathways to the magnetic charge crystal in artificial dipolar spin ice | | I. A. Chioar
; B. Canals
; D. Lacour
; M. Hehn
; B. Santos Burgos
; T. O. Mentes
; A. Locatelli
; F. Montaigne
; N. Rougemaille
; | | Date: |
16 Dec 2014 | | Abstract: | We investigate experimentally magnetic frustration effects in thermally
active artificial kagome spin ice. Starting from a paramagnetic state, the
system is cooled down below the Curie temperature of the constituent material.
The resulting magnetic configurations show that our arrays are locally brought
into the so-called spin ice 2 phase, predicted by at-equilibrium Monte Carlo
simulations and characterized by a magnetic charge crystal embedded in a
disordered kagome spin lattice. However, by studying our arrays on a larger
scale, we find unambiguous signature of an out-of-equilibrium physics.
Comparing our findings with numerical simulations, we interpret the efficiency
of our thermalization procedure in terms of kinetic pathways that the system
follows upon cooling and which drive the arrays into degenerate low-energy
manifolds that are hardly accessible otherwise. | | Source: | arXiv, 1412.5208 | | Services: | Forum | Review | PDF | Favorites | |
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