Velocity distribution and yield measurements of Fe ejected from FeS sub 2 during ion bombardment

Journal Article · Fri May 01 00:00:00 EDT 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.45.10255· OSTI ID:7043326

Nikzad, S; Calaway, W F; Young, C E; Pellin, M J; Gruen, D M ^[1]; Tombrello, T A ^[2]; Housley, R M ^[3]

---

1. Materials Science and Chemistry Divisions, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Physics, Mathematics, and Astronomy Division, California Institute of Technology, Pasadena, California 91125 (United States)
3. Rockwell International Science Center, Thousand Oaks, California 91360 (United States)

Secondary neutrals sputtered by 3-keV Ar{sup +} from FeS{sub 2} and Fe were studied by use of laser postionization mass spectrometry and laser-induced fluorescence spectroscopy. The velocity distribution and yield of Fe from the FeS{sub 2} sample were measured. The velocity distribution of Fe sputtered from the sulfide is very similar to that of sputtered Fe from the pure metal with both distributions peaking at nearly the same velocity. The yield of Fe from the sulfide target, after prolonged bombardment, was at most 27% of the yield from the metal. The results are compared with Monte Carlo calculations using the TRIM (transport of ions in matter) code. The total sputtering yield of FeS{sub 2} was measured using profilometry and was compared with the same measurements of the sputtered metal targets. The surface of the FeS{sub 2} was examined by x-ray photoelectron spectroscopy before and after ion bombardment and indicates preferential sputtering of S at low primary ion doses. After prolonged bombardment, the surface becomes similar to that of FeS. The profilometry measurements and the yield measured by mass spectrometry indicate that some of the sputtered Fe is not observed in the neutral ground state; we propose that the unobserved Fe is in the form of clusters.

• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 7043326
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 45:18; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ARGON IONS
COLLISIONS
IRON
SPUTTERING
IRON SULFIDES
COMPUTERIZED SIMULATION
FLUORESCENCE
KEV RANGE 01-10
MASS SPECTROSCOPY
MONTE CARLO METHOD
SECONDARY EMISSION
CHALCOGENIDES
CHARGED PARTICLES
ELEMENTS
EMISSION
ENERGY RANGE
IONS
IRON COMPOUNDS
KEV RANGE
LUMINESCENCE
METALS
SIMULATION
SPECTROSCOPY
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
665300* - Interactions Between Beams & Condensed Matter- (1992-)