Thickness dependence of spin wave excitations in an artificial square spin ice-like geometry
نویسندگان
چکیده
منابع مشابه
Brillouin light scattering study of magnetic-element normal modes in a square artificial spin ice geometry
We report the results, from experimental and micromagnetic studies, of the magnetic normal modes in artificial square spin ice systems consisting of ferromagnetic-monodomain islands. Spin-wave properties are measured by Brillouin light scattering. The mode spectra contain several branches whose frequencies are sensitive to the magnitude and in-plane orientation of an applied magnetic field. We ...
متن کاملMagnetic monopole and string excitations in two-dimensional spin ice
We study the magnetic excitations of a square lattice spin-ice recently produced in an artificial form, as an array of nanoscale magnets. Our analysis, based upon the dipolar interaction between the nanomagnetic islands, correctly reproduces the ground-state observed experimentally. In addition, we find magnetic monopole-like excitations effectively interacting by means of the usual Coulombic p...
متن کاملTailoring the magnetic order in mesoscopic spin systems
Stopfel, H. 2017. Tailoring the magnetic order in mesoscopic spin systems. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1574. 78 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-513-0099-3. Mesoscopic spin systems can be designed and fabricated using modern nano-fabrication techniques. These systems can contain large numbers of patt...
متن کاملNanometre-scale probing of spin waves using single-electron spins
Pushing the frontiers of condensed-matter magnetism requires the development of tools that provide real-space, few-nanometre-scale probing of correlated-electron magnetic excitations under ambient conditions. Here we present a practical approach to meet this challenge, using magnetometry based on single nitrogen-vacancy centres in diamond. We focus on spin-wave excitations in a ferromagnetic mi...
متن کاملVortices in Quantum Spin Systems
We examine spin vortices in ferromagnetic quantum Heisenberg models with planar anisotropy on two–dimensional lattices. The symmetry properties and the time evolution of vortices built up from spin–coherent states are studied in detail. Although these states show a dispersion typical for wave packets, important features of classical vortices are conserved. Moreover, the results on symmetry prop...
متن کامل