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양자나노과학 연구단
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Thermal and Magnetic-Field Stability of Holmium Single-Atom Magnets

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Title
Thermal and Magnetic-Field Stability of Holmium Single-Atom Magnets
Author(s)
Fabian D. Natterer; Fabio Donati; François Patthey; Harald Brune
Publication Date
2018-07
Journal
Physical Review Letters, v.121, no.2, pp.027201 -
Publisher
American Physical Society
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
URI
https://pr.ibs.re.kr/handle/8788114/5254
ISSN
0031-9007
Appears in Collections:
Center for Quantum Nanoscience(양자나노과학 연구단) > Journal Papers (저널 논문)
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PhysRevLett.121.027201_Fabio Donati.pdfDownload

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