Melting artificial spin ice
2012 (English)In: New Journal of Physics, ISSN 1367-2630, Vol. 14, 035009- p.Article in journal (Refereed) Published
Artiﬁcial spin ice arrays of micromagnetic islands are a means of engineering additional energy scales and frustration into magnetic materials. Here we demonstrate a magnetic phase transition in an artiﬁcial square spin ice and use the symmetry of the lattice to verify the presence of excitations far below the ordering temperature. We do this by measuring the temperature dependent magnetisation in diﬀerent principal directions and comparing with simulations of idealised statistical mechanical models. Our results conﬁrm a dynamical pre-melting of the artiﬁcial spin ice structure at a temperature well below the intrinsic ordering temperature of the island material. We thus create a spin ice array that has real thermal dynamics of the artiﬁcial spins over an extended temperature range.
Place, publisher, year, edition, pages
2012. Vol. 14, 035009- p.
artificial spin ice, ising model, magnetization dynamics
Other Physics Topics
Research subject Physics of Matter
IdentifiersURN: urn:nbn:se:uu:diva-168982DOI: 10.1088/1367-2630/14/3/035009ISI: 000302342000002OAI: oai:DiVA.org:uu-168982DiVA: diva2:504579
FunderSwedish Research Council