Magnetic remanence in single atoms

F. Donati; S. Rusponi; S. Stepanow; C. Wäckerlin; A. Singha; L. Persichetti; R. Baltic; K. Diller; F. Patthey; E. Fernandes; J. Dreiser; Šljivančanin; K. Kummer; C. Nistor; P. Gambardella; H. Brune

doi:10.1126/science.aad9898

Magnetic remanence in single atoms

F. Donati, S. Rusponi, S. Stepanow, C. Wäckerlin, A. Singha, L. Persichetti, R. Baltic, K. Diller, F. Patthey, E. Fernandes, J. Dreiser, Šljivančanin, K. Kummer, C. Nistor, P. Gambardella, H. Brune

Department of Physics

Research output: Contribution to journal › Article › peer-review

260 Scopus citations

Abstract

A permanent magnet retains a substantial fraction of its saturation magnetization in the absence of an external magnetic field. Realizing magnetic remanence in a single atom allows for storing and processing information in the smallest unit of matter. We show that individual holmium (Ho) atoms adsorbed on ultrathin MgO(100) layers on Ag(100) exhibit magnetic remanence up to a temperature of 30 kelvin and a relaxation time of 1500 seconds at 10 kelvin. This extraordinary stability is achieved by the realization of a symmetry-protected magnetic ground state and by decoupling the Ho spin from the underlying metal by a tunnel barrier.

Original language	English
Pages (from-to)	318-321
Number of pages	4
Journal	Science
Volume	352
Issue number	6283
DOIs	https://doi.org/10.1126/science.aad9898
State	Published - 15 Apr 2016

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© 2016, American Association for the Advancement of Science. All rights reserved.

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abstract = "A permanent magnet retains a substantial fraction of its saturation magnetization in the absence of an external magnetic field. Realizing magnetic remanence in a single atom allows for storing and processing information in the smallest unit of matter. We show that individual holmium (Ho) atoms adsorbed on ultrathin MgO(100) layers on Ag(100) exhibit magnetic remanence up to a temperature of 30 kelvin and a relaxation time of 1500 seconds at 10 kelvin. This extraordinary stability is achieved by the realization of a symmetry-protected magnetic ground state and by decoupling the Ho spin from the underlying metal by a tunnel barrier.",

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T1 - Magnetic remanence in single atoms

AU - Donati, F.

AU - Rusponi, S.

AU - Stepanow, S.

AU - Wäckerlin, C.

AU - Singha, A.

AU - Persichetti, L.

AU - Baltic, R.

AU - Diller, K.

AU - Patthey, F.

AU - Fernandes, E.

AU - Dreiser, J.

AU - Šljivančanin,

AU - Kummer, K.

AU - Nistor, C.

AU - Gambardella, P.

AU - Brune, H.

PY - 2016/4/15

Y1 - 2016/4/15

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AB - A permanent magnet retains a substantial fraction of its saturation magnetization in the absence of an external magnetic field. Realizing magnetic remanence in a single atom allows for storing and processing information in the smallest unit of matter. We show that individual holmium (Ho) atoms adsorbed on ultrathin MgO(100) layers on Ag(100) exhibit magnetic remanence up to a temperature of 30 kelvin and a relaxation time of 1500 seconds at 10 kelvin. This extraordinary stability is achieved by the realization of a symmetry-protected magnetic ground state and by decoupling the Ho spin from the underlying metal by a tunnel barrier.

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Magnetic remanence in single atoms

Abstract

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