Extended x-ray-absorption fine-structure studies of Zn sub 1 minus x Mn sub x Se alloy structure
Journal Article
·
· Physical Review, B: Condensed Matter; (USA)
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 (USA)
Bond lengths, Debye-Waller factors, and site occupancy in the diluted magnetic semiconductor Zn{sub 1{minus}{ital x}}Mn{sub {ital x}}Se have been measured using extended x-ray-absorption fine structure. The nearest-neighbor bond lengths at both room temperature and low temperature (77 K) are found to be constant as a function of alloy composition within the experimental uncertainty of 0.01 A. Because the average cation-cation distance changes with Mn content, these results necessarily imply distortion of the tetrahedral bond angles. The anion sublattice is shown to suffer the largest distortion, but the cation sublattice also exhibits some relaxation. The repercussions of these results are discussed, in terms of the amount of cation and anion sublattice distortion at low temperature and its connection to the superexchange mechanism occurring between the Mn{sup 2+} ions and mediated by the intervening anion in Zn{sub 1{minus}{ital x}}Mn{sub {ital x}}Se.
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6946950
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 41:12; ISSN PRBMD; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ABSORPTION SPECTRA
BOND LENGTHS
CHALCOGENIDES
DEBYE-WALLER FACTOR
DIMENSIONS
LENGTH
LOW TEMPERATURE
MAGNETIC SEMICONDUCTORS
MANGANESE COMPOUNDS
MANGANESE SELENIDES
MATERIALS
MEDIUM TEMPERATURE
SELENIDES
SELENIUM COMPOUNDS
SEMICONDUCTOR MATERIALS
SPECTRA
TRANSITION ELEMENT COMPOUNDS
X-RAY SPECTRA
ZINC COMPOUNDS
ZINC SELENIDES
360603* -- Materials-- Properties
ABSORPTION SPECTRA
BOND LENGTHS
CHALCOGENIDES
DEBYE-WALLER FACTOR
DIMENSIONS
LENGTH
LOW TEMPERATURE
MAGNETIC SEMICONDUCTORS
MANGANESE COMPOUNDS
MANGANESE SELENIDES
MATERIALS
MEDIUM TEMPERATURE
SELENIDES
SELENIUM COMPOUNDS
SEMICONDUCTOR MATERIALS
SPECTRA
TRANSITION ELEMENT COMPOUNDS
X-RAY SPECTRA
ZINC COMPOUNDS
ZINC SELENIDES