High dose Fe implantation of graphite at elevated temperature
Highly oriented pyrolytic graphite samples have been implanted at elevated temperature (450 /sup 0/C) with /sup 57/Fe species at high fluence (2 x 10/sup 17/ cm/sup -2/) and a bombarding energy of 35 keV. Under these conditions of implantation, materials with ferromagnetic properties have been synthesized, as demonstrated by magnetization measurements using a superconducting quantum interference device magnetometer. It is further shown that the samples exhibit ferromagnetic, paramagnetic, and diamagnetic contributions to the total magnetization. The value of the measured coercive force and a comparison of scanning electron microscopy studies of the sample surface with the calculation of the saturation ferromagnetic moment suggest that fine iron particles are created on the surface. A mechanism is proposed to explain these observations. Complementary Rutherford backscattering spectroscopy and Raman measurements indicate that the lattice is not completely amorphized under these implantation conditions.
- Research Organization:
- Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
- OSTI ID:
- 5739715
- Journal Information:
- J. Appl. Phys.; (United States), Vol. 63:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GRAPHITE
COERCIVE FORCE
ION IMPLANTATION
MAGNETIZATION
EXPERIMENTAL DATA
FERROMAGNETIC MATERIALS
HIGH TEMPERATURE
IRON 57
KEV RANGE 10-100
SCANNING ELECTRON MICROSCOPY
SQUID DEVICES
CARBON
DATA
ELECTRON MICROSCOPY
ELECTRONIC EQUIPMENT
ELEMENTAL MINERALS
ELEMENTS
ENERGY RANGE
EQUIPMENT
EVEN-ODD NUCLEI
FLUXMETERS
INFORMATION
INTERMEDIATE MASS NUCLEI
IRON ISOTOPES
ISOTOPES
KEV RANGE
MAGNETIC MATERIALS
MATERIALS
MEASURING INSTRUMENTS
MICROSCOPY
MICROWAVE EQUIPMENT
MINERALS
NONMETALS
NUCLEI
NUMERICAL DATA
STABLE ISOTOPES
SUPERCONDUCTING DEVICES
360603* - Materials- Properties