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News and Views
Nature 461, 888-889 (15 October 2009) | doi:10.1038/461888a; Published online 14 October 2009
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Condensed-matter physics: Wien route to monopoles
Shivaji Sondhi1
Abstract
Determining the magnetic charge of monopoles in a crystalline host seemed a mountain too high for physicists to climb. An experiment based on Wien's theory of electrolytes has now measured its value.
The exotic class of crystalline solids known as 'spin ices' has proved, perhaps surprisingly, to be a repository of some elegant physical phenomena. Spin ices are rare, three-dimensional systems in which the magnetic moments (spins) of the ions remain disordered even at the lowest temperatures available.
- Shivaji Sondhi is in the Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
Email: sondhi@princeton.edu
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Magnetic monopoles have for a long time eluded detection by experiment. Theory now identifies a signature of monopole dynamics that is measurable experimentally, and that has already been seen in magnetic relaxation measurements in a spin-ice material. Magnetic monopoles have for a long time eluded detection by experiment. Theory now identifies a signature of monopole dynamics that is measurable experimentally, and that has already been seen in magnetic relaxation measurements in a spin-ice material.Nature Physics Letter (01 Apr 2009)
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