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Long-range magnetic interactions and proximity effects in an amorphous exchange-spring magnet
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Magnus, F., Brooks-Bartlett, M. E., Moubah, R., Procter, Rachael A., Andersson, G., Hase, Thomas P. A., Banks, S. T. and Hjörvarsson, B. (2016) Long-range magnetic interactions and proximity effects in an amorphous exchange-spring magnet. Nature Communications, 7 . 11931. doi:10.1038/ncomms11931 ISSN 2041-1723.
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Official URL: http://dx.doi.org/10.1038/ncomms11931
Abstract
Low-dimensional magnetic heterostructures are a key element of spintronics, where magnetic interactions between different materials often define the functionality of devices. Although some interlayer exchange coupling mechanisms are by now well established, the possibility of direct exchange coupling via proximity-induced magnetization through non-magnetic layers is typically ignored due to the presumed short range of such proximity effects. Here we show that magnetic order can be induced throughout a 40-nm-thick amorphous paramagnetic layer through proximity to ferromagnets, mediating both exchange-spring magnet behaviour and exchange bias. Furthermore, Monte Carlo simulations show that nearest-neighbour magnetic interactions fall short in describing the observed effects and long-range magnetic interactions are needed to capture the extent of the induced magnetization. The results highlight the importance of considering the range of interactions in low-dimensional heterostructures and how magnetic proximity effects can be used to obtain new functionality.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
| Library of Congress Subject Headings (LCSH): | Spintronics, Ferromagnetic materials, Heterostructures, Magnetization, Magnetism | ||||||||
| Journal or Publication Title: | Nature Communications | ||||||||
| Publisher: | Nature Publishing Group | ||||||||
| ISSN: | 2041-1723 | ||||||||
| Official Date: | 13 June 2016 | ||||||||
| Dates: |
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| Volume: | 7 | ||||||||
| Article Number: | 11931 | ||||||||
| DOI: | 10.1038/ncomms11931 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||
| Date of first compliant deposit: | 9 February 2017 | ||||||||
| Funder: | Sweden. Vetenskapsrådet, Stiftelsen för internationalisering av högre utbildning och forskning, Knut och Alice Wallenbergs Stiftelse (Sweden), Carl Tryggers Stiftelse för Vetenskaplig Forskning (Sweden), United States. Department of Energy. Office of Basic Energy Sciences (OBES) | ||||||||
| Grant number: | DE-AC02-98CH10886 (OBES) | ||||||||
| Adapted As: |
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