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자연과학대학
물리학전공
Journal papers
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Thermal and Magnetic-Field Stability of Holmium Single-Atom Magnets
Title
Thermal and Magnetic-Field Stability of Holmium Single-Atom Magnets
Authors
Natterer F.D.
;
Donati F.
;
Patthey F.
;
Brune H.
Ewha Authors
Fabio Donati
SCOPUS Author ID
Fabio Donati
Issue Date
2018
Journal Title
Physical Review Letters
ISSN
0031-9007
Citation
Physical Review Letters vol. 121, no. 2
Publisher
American Physical Society
Indexed
SCIE; SCOPUS
Document Type
Article
Abstract
We use spin-polarized scanning tunneling microscopy to demonstrate that Ho atoms on magnesium oxide exhibit a coercive field of more than 8 T and magnetic bistability for many minutes, both at 35 K. The first spontaneous magnetization reversal events are recorded at 45 K, for which the metastable state relaxes in an external field of 8 T. The transverse magnetic anisotropy energy is estimated from magnetic field and bias voltage dependent switching rates at 4.3 K. Our measurements constrain the possible ground state of Ho single-atom magnets to either Jz=7 or 8, both compatible with magnetic bistability at fields larger than 10 mT. © 2018 American Physical Society.
DOI
10.1103/PhysRevLett.121.027201
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