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Title: Multilayered graphene acquires ferromagnetism in proximity with magnetite particles

Anisotropic diamagnetism of pristine graphite and graphene is well known. Here, evidence of significant induced ferromagnetism in multilayer graphene (MLG) decorated with ferrimagnetic Fe{sub 3}O{sub 4} particles is reported. This MLG-Fe{sub 3}O{sub 4} nano-composite was prepared by a one-step ultrasonic treatment at 75 °C in the surfactant sodium dodecyl-benzene-sulfonate. To verify the phase structure and morphology of the composite, X-ray diffraction, scanning and transmission electron microscopy, scanning tunneling electron microscopy, and Raman spectroscopy were employed. Room temperature data of magnetization versus magnetic field showed that the saturation magnetization M{sub S} = 58.6 emu/gm for pristine Fe{sub 3}O{sub 4} increased to M{sub S} = 158.4 emu/gm for a 1:1 composite of Fe{sub 3}O{sub 4} to MLG. These results lead to induced M{sub S} = 253 emu/gm in MLG resulting from its proximity to Fe{sub 3}O{sub 4}. Similar experiments on Fe{sub 3}O{sub 4} to single walled carbon nanotubes (SWNT) composite did not show any induced magnetism in SWNT.
Authors:
;  [1] ; ;  [2] ;  [3] ;  [4]
  1. Department of Physics, Morgan State University, Baltimore, Maryland 21251 (United States)
  2. Army Research Laboratory, Weapons and Materials Research Directorate, Aberdeen Proving Ground, Maryland 21005 (United States)
  3. Department of Material and Metallurgical Engineering, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701 (United States)
  4. Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506 (United States)
Publication Date:
OSTI Identifier:
22402491
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 21; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BENZENE; CARBON NANOTUBES; DIAMAGNETISM; FERRITES; FERROMAGNETISM; GRAPHENE; GRAPHITE; IRON OXIDES; LAYERS; MAGNETIC FIELDS; MAGNETITE; MAGNETIZATION; RAMAN SPECTROSCOPY; SCANNING TUNNELING MICROSCOPY; SODIUM; TEMPERATURE RANGE 0273-0400 K; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION