Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Creation and measurement of long-lived magnetic monopole currents in spin ice

Giblin, Sean, Bramwell, S. T., Holdsworth, P. C. W., Prabhakaran, D. and Terry, I. 2011. Creation and measurement of long-lived magnetic monopole currents in spin ice. Nature Physics 7 (3) , pp. 252-258. 10.1038/nphys1896

Full text not available from this repository.

Abstract

The recent discovery of ‘magnetricity’ in spin ice raises the question of whether long-lived currents of magnetic ‘monopoles’ can be created and manipulated by applying magnetic fields. Here we show that they can. By applying a magnetic-field pulse to a Dy2Ti2O7 spin-ice crystal at 0.36 K, we create a relaxing magnetic current that lasts for several minutes. We measure the current by means of the electromotive force it induces in a solenoid coupled to a sensitive amplifier, and quantitatively describe it using a chemical kinetic model of point-like charges obeying the Onsager–Wien mechanism of carrier dissociation and recombination. We thus derive the microscopic parameters of monopole motion in spin ice and identify the distinct roles of free and bound magnetic charges. Our results illustrate a basic capacitor effect for magnetic charge and should pave the way for the design and realization of ‘magnetronic’ circuitry.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Uncontrolled Keywords: Condensed-matter physics; Materials physics
Publisher: Nature Publishing Group
ISSN: 1745-2473
Last Modified: 04 Jun 2017 04:37
URI: http://orca.cf.ac.uk/id/eprint/41514

Citation Data

Cited 122 times in Google Scholar. View in Google Scholar

Cited 90 times in Scopus. View in Scopus. Powered By Scopus® Data

Cited 63 times in Web of Science. View in Web of Science.

Actions (repository staff only)

Edit Item Edit Item