dc.contributor.author | Gliga, S | |
dc.contributor.author | Hrkac, G | |
dc.contributor.author | Donnelly, C | |
dc.contributor.author | Büchi, J | |
dc.contributor.author | Kleibert, A | |
dc.contributor.author | Cui, J | |
dc.contributor.author | Farhan, A | |
dc.contributor.author | Kirk, E | |
dc.contributor.author | Chopdekar, RV | |
dc.contributor.author | Masaki, Y | |
dc.contributor.author | Bingham, NS | |
dc.contributor.author | Scholl, A | |
dc.contributor.author | Stamps, RL | |
dc.contributor.author | Heyderman, LJ | |
dc.date.accessioned | 2019-02-13T10:01:55Z | |
dc.date.issued | 2017-10-23 | |
dc.description.abstract | Modern nanofabrication techniques have opened the possibility to create novel functional materials, whose properties transcend those of their constituent elements. In particular, tuning the magnetostatic interactions in geometrically frustrated arrangements of nanoelements called artificial spin ice1,2 can lead to specific collective behaviour3, including emergent magnetic monopoles4,5, charge screening6,7 and transport8,9, as well as magnonic response10-12. Here, we demonstrate a spin-ice-based activematerial in which energy is converted into unidirectional dynamics. Using X-ray photoemission electron microscopy we show that the collective rotation of the average magnetization proceeds in a unique sense during thermal relaxation. Our simulations demonstrate that this emergent chiral behaviour is driven by the topology of the magnetostatic field at the edges of the nanomagnet array, resulting in an asymmetric energy landscape. In addition, a bias field can be used to modify the sense of rotation of the average magnetization. This opens the possibility of implementing a magnetic Brownian ratchet13,14, which may find applications in novel nanoscale devices, such as magnetic nanomotors, actuators, sensors or memory cells. | en_GB |
dc.description.sponsorship | Engineering and Physical Sciences Research Council (EPSRC) | en_GB |
dc.description.sponsorship | Royal Society (Government) | en_GB |
dc.description.sponsorship | University of St Poelten | en_GB |
dc.description.sponsorship | European Union Horizon 2020: Marie Sklodowska-Curie grant | en_GB |
dc.description.sponsorship | Vienna Science and Technology Fund | en_GB |
dc.description.sponsorship | Swiss National Science Foundation | en_GB |
dc.identifier.citation | Vol. 16, pp. 1106 - 1112 | en_GB |
dc.identifier.doi | 10.1038/NMAT5007 | |
dc.identifier.grantnumber | EP/L019876/1 | en_GB |
dc.identifier.grantnumber | EP/M015173/1 | en_GB |
dc.identifier.grantnumber | 708674 | en_GB |
dc.identifier.grantnumber | UF080837 | en_GB |
dc.identifier.grantnumber | EP/ L002922/1 | en_GB |
dc.identifier.grantnumber | EP/M024423/1 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/35925 | |
dc.language.iso | en | en_GB |
dc.publisher | Nature Research | en_GB |
dc.rights | © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved | en_GB |
dc.title | Emergent dynamic chirality in a thermally driven artificial spin ratchet | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2019-02-13T10:01:55Z | |
dc.identifier.issn | 1476-1122 | |
dc.description | This is the author accepted manuscript. The final version is available from Nature Research via the DOI in this record. | en_GB |
dc.identifier.journal | Nature Materials | en_GB |
dc.rights.uri | http://www.rioxx.net/licenses/all-rights-reserved | en_GB |
dcterms.dateAccepted | 2017-09-12 | |
exeter.funder | ::Engineering and Physical Sciences Research Council (EPSRC) | en_GB |
exeter.funder | ::Royal Society (Government) | en_GB |
exeter.funder | ::Engineering and Physical Sciences Research Council (EPSRC) | en_GB |
exeter.funder | ::University of St Poelten | en_GB |
rioxxterms.version | AM | en_GB |
rioxxterms.licenseref.startdate | 2017-09-12 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2019-02-13T09:51:50Z | |
refterms.versionFCD | AM | |
refterms.dateFOA | 2019-02-13T10:01:57Z | |
refterms.panel | B | en_GB |