X-ray-edge studies and photoemission of Mn/sub x/Sn/sub 1-//sub x/Mo/sub 6/S/sub 8/

Journal Article · Mon Dec 01 04:00:00 EST 1986 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.34.7698· OSTI ID:6963010

Brown, F C; Bunker, B A; Ginsberg, D M; Miller, T J; Miller, W M; Stern, E A

X-ray-absorption and -photoemission studies were carried out on the manganese-doped Chevrel-phase compound Mn/sub x/Sn/sub 1-//sub x/Mo/sub 6/S/sub 8/ for x = 0.1, where a maximum superconducting transition temperature T/sub c/ occurs. With use of synchrotron radiation and x-ray fluorescence, near-edge-absorption and extended x-ray-absorption fine-structure (EXAFS) spectra were obtained at the K edge of Mn in the doped compound. The results indicate that each manganese atom, surrounded by eight sulfur atoms, substitutes for tin at the center of a large cavity in SnMo/sub 6/S/sub 8/. The manganese-sulfur nearest-neighbor distance is found to be 2.02 +- 0.05 A, somewhat less than 2.26 A for Sn in SnMo/sub 6/S/sub 8/. The probable charge of manganese is found to be 4+ and, considering the valence-electron-charge model of charge transfer, this explains the observed maximum in T/sub c/. The photoemission experiments yield an energy distribution curve for the valence band which is in good agreement with band theory.

• Research Organization: Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801
• OSTI ID: 6963010
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 34:11; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
CHALCOGENIDES
CORRELATIONS
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
EMISSION
IMPURITIES
IONIZING RADIATIONS
MANGANESE COMPOUNDS
MANGANESE SULFIDES
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
PHOTOEMISSION
PHYSICAL PROPERTIES
RADIATIONS
REFRACTORY METAL COMPOUNDS
SECONDARY EMISSION
SPECTRA
SULFIDES
SULFUR COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TIN COMPOUNDS
TIN SULFIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X RADIATION
X-RAY SPECTRA