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  Control of quantum magnets by atomic exchange bias

Yan, S., Choi, D., Burgess, J., Rolf-Pissarczyk, S., & Loth, S. (2015). Control of quantum magnets by atomic exchange bias. Nature Nanotechnology, 10(1), 40-45. doi:10.1038/nnano.2014.281.

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https://dx.doi.org/10.1038/nnano.2014.281 (Publisher version)
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 Creators:
Yan, S.1, 2, Author              
Choi, D.J.1, 2, Author              
Burgess, J.A.J1, 2, Author              
Rolf-Pissarczyk, Steffen1, 2, Author              
Loth, S.1, 2, Author              
Affiliations:
1Dynamics of Nanoelectronic Systems, Independent Research Groups, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938290              
2Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany, ou_persistent22              

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Free keywords: Nanoscience; technology
 Abstract: Mixing of discretized states in quantum magnets has a radical impact on their properties. Managing this effect is key for spintronics in the quantum limit. Magnetic fields can modify state mixing and, for example, mitigate destabilizing effects in single-molecule magnets. The exchange bias field has been proposed as a mechanism for localized control of individual nanomagnets. Here, we demonstrate that exchange coupling with the magnetic tip of a scanning tunnelling microscope provides continuous tuning of spin state mixing in an individual nanomagnet. By directly measuring spin relaxation time with electronic pump–probe spectroscopy, we find that the exchange interaction acts analogously to a local magnetic field that can be applied to a specific atom. It can be tuned in strength by up to several tesla and cancel external magnetic fields, thereby demonstrating the feasibility of complete control over individual quantum magnets with atomically localized exchange coupling.

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Language(s): eng - English
 Dates: 2014-07-292014-10-312014-12-152015-01
 Publication Status: Published in print
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1038/nnano.2014.281
 Degree: -

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Title: Nature Nanotechnology
  Other : Nat. Nanotechnol.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 10 (1) Sequence Number: - Start / End Page: 40 - 45 Identifier: ISSN: 1748-3387
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000239770