Anomalous magnetic behavior at the graphene/Co interface

Anomalous magnetic behavior at the graphene/Co interface

An intensive theoretical study on the interaction between graphene and transition metal atom has been carried out; however, its experimental verification is still lacking. To explore the theoretical prediction of antiferromagnetic coupling due to charge transfer between graphene and cobalt, epitaxia...

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Veröffentlicht in:Applied physics letters 2014-07, Vol.105 (2)
Hauptverfasser: Mandal, Sumit, Saha, Shyamal K.
Format: Artikel
Sprache:eng
Schlagworte:
ANTIFERROMAGNETISM
Applied physics
Charge transfer
COBALT
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
COUPLING
Epitaxial growth
EPITAXY
GRAPHENE
INTERACTIONS
INTERFACES
LAYERS
MAGNETIC FIELDS
Magnetic properties
MAGNETORESISTANCE
Magnetoresistivity
NEEL TEMPERATURE
Predictions
SURFACES
TEMPERATURE RANGE 0013-0065 K
Transition metals
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Beschreibung
Zusammenfassung:An intensive theoretical study on the interaction between graphene and transition metal atom has been carried out; however, its experimental verification is still lacking. To explore the theoretical prediction of antiferromagnetic coupling due to charge transfer between graphene and cobalt, epitaxial layer of cobalt is grown on graphene surface. Predicted antiferromagnetic interaction with Neel temperature (TN ∼ 32 K) which anomalously shifts to higher temperature (34 K) and becomes more prominent under application of magnetic field of 1 T is reported. Lowering of magnetoresistance as a consequence of this antiferromagnetic coupling at the interface is also observed.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4890382