OsPd bimetallic dimer pushes the limit of magnetic anisotropy in atom-sized magnets for data storage.
Nanotechnology
; 33(21)2022 Feb 28.
Article
en En
| MEDLINE
| ID: mdl-35147526
ABSTRACT
The growing gap between the volume of digital data being created and the extent of available storage capacities stimulates intensive research into surface-supported, well-ordered array of atom-sized magnets that represents the ultimate limit of magnetic data storage. Anchoring transition-metal heterodimers in vacancy defects in the graphene lattice has been identified as a vivid strategy to achieve large magnetic anisotropy energy (MAE) up to 80 meV with an easy axis aligned along the dimer bond. In this paper we have made a significant leap forward finding out MAE of 119 meV for an OsPt dimer and 170 meV for an OsPd dimer bound to a single nitrogen-decorated vacancy defect. The system with the highest MAE and with the theoretical storage density of â¼490 Tb·inch-2pushes the current limit of theoretical blocking temperature in graphene-supported transition-metal dimers from â¼20 to â¼44 K assuming the relaxation time of 10 years. The mechanism of the enhanced MAE is discussed.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Nanotechnology
Año:
2022
Tipo del documento:
Article
País de afiliación:
República Checa
Pais de publicación:
ENGLAND
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ESCOCIA
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GB
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GREAT BRITAIN
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INGLATERRA
/
REINO UNIDO
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SCOTLAND
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UK
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UNITED KINGDOM