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Title: 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, epitaxial layer of cobalt is grown on graphene surface. Predicted antiferromagnetic interaction with Neel temperature (T{sub N} ∼ 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.
Authors:
;  [1]
  1. Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032 (India)
Publication Date:
OSTI Identifier:
22311083
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANTIFERROMAGNETISM; COBALT; COUPLING; EPITAXY; GRAPHENE; INTERACTIONS; INTERFACES; LAYERS; MAGNETIC FIELDS; MAGNETORESISTANCE; NEEL TEMPERATURE; SURFACES; TEMPERATURE RANGE 0013-0065 K