High dose Fe implantation of graphite at elevated temperature

Journal Article · Thu Dec 31 23:00:00 EST 1987 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.340489· OSTI ID:5739715

Lusnikov, A; Ohana, I; Dresselhaus, M S; Withrow, S P

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), Journal Name: J. Appl. Phys.; (United States) Vol. 63:1; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
CARBON
COERCIVE FORCE
DATA
ELECTRON MICROSCOPY
ELECTRONIC EQUIPMENT
ELEMENTAL MINERALS
ELEMENTS
ENERGY RANGE
EQUIPMENT
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FERROMAGNETIC MATERIALS
FLUXMETERS
GRAPHITE
HIGH TEMPERATURE
INFORMATION
INTERMEDIATE MASS NUCLEI
ION IMPLANTATION
IRON 57
IRON ISOTOPES
ISOTOPES
KEV RANGE
KEV RANGE 10-100
MAGNETIC MATERIALS
MAGNETIZATION
MATERIALS
MEASURING INSTRUMENTS
MICROSCOPY
MICROWAVE EQUIPMENT
MINERALS
NONMETALS
NUCLEI
NUMERICAL DATA
SCANNING ELECTRON MICROSCOPY
SQUID DEVICES
STABLE ISOTOPES
SUPERCONDUCTING DEVICES