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Title: Deconvolution of mixed magnetism in multilayer graphene

Magnetic properties of graphite modified at the edges by KCl and exfoliated graphite in the form of twisted multilayered graphene (<4 layers) are analyzed to understand the evolution of magnetic behavior in the absence of any magnetic impurities. The mixed magnetism in multilayer graphene is deconvoluted using Low field-high field hysteresis loops at different temperatures. In addition to temperature and the applied magnetic field, the density of edge state spins and the interaction between them decides the nature of the magnetic state. By virtue of magnetometry and electron spin resonance studies, we demonstrate that ferromagnetism is intrinsic and is due to the interactions among various paramagnetic centers. The strength of these magnetic correlations can be controlled by modifying the structure.
Authors:
 [1] ;  [2]
  1. IITB-Monash Research Academy, Department of Metallurgical Engineering and Materials Science, IIT Bombay, Mumbai 400076 (India)
  2. Department of Metallurgical Engineering and Materials Science, IIT Bombay, Mumbai 400076 (India)
Publication Date:
OSTI Identifier:
22299903
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 24; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ELECTRON SPIN RESONANCE; FERROMAGNETISM; GRAPHENE; GRAPHITE; IMPURITIES; INTERACTIONS; LAYERS; MAGNETIC FIELDS; MAGNETIC PROPERTIES; PARAMAGNETISM; POTASSIUM CHLORIDES; SPIN