Morgan, J P, Kinane, C J, Charlton, T R, Stein, A, Sanchez-Hanke, C, Arena, D A, Langridge, S and Marrows, C H 2012. Magnetic hysteresis of an artificial square ice studied by in-plane Bragg xray resonant magnetic scattering. AIP Advances 2 (2) , 022163. 10.1063/1.4732147 |
Abstract
We report X-ray resonant magnetic scattering studies of a Permalloy artificial square ice nanomagnet array, focussing on the field-driven evolution of the sum σ and difference δ signals of left and right handed circularly polarized synchrotron X-rays at different lateral positions in reciprocal space Qx. We used X-rays tuned to the Fe L3 resonance energy, with the scattering plane aligned along a principal symmetry axis of the array. Details of the specular δ hysteresis curve are discussed, following the system magnetization from an initial demagnetized state. The periodic structure gives rise to distinct peaks at in-plane reciprocal Bragg positions, as shown by fitting σ(Qx) to a model based on a simple unit cell structure. Diffraction orderdependent hysteresis in δ is observed, indicative of the reordering of magnetization on the system's two interpenetrating sublattices, which markedly deviates from an ideal Ising picture under strong applied fields.
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Physics and Astronomy |
Publisher: | American Institute of Physics |
ISSN: | 2158-3226 |
Date of Acceptance: | 8 June 2012 |
Last Modified: | 25 May 2023 14:45 |
URI: | https://orca.cardiff.ac.uk/id/eprint/157996 |
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