Anharmonic contribution to the Debye-Waller factor for copper, silver, and lead

Journal Article · Sat Jul 01 04:00:00 EDT 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.52.168· OSTI ID:76415

Day, J T; Mullen, J G ^[1]; Shukla, R C ^[2]

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1. Physics Department, Purdue University, West Lafayette, Indiana 47907-1396 (United States)
2. Physics Department, Brock University, St. Catharines, Ontario, L2S 3A1 (Canada)

Using high intensity ({similar_to}70 Ci) {sup 183}Ta Moessbauer sources, we have measured the elastic scattering fraction values, {ital scrF}, and the relative integrated scattering intensities for the (200), (400), (600), and (220) Bragg planes of copper and silver single crystals; and for the (200), (400), and (600) reflections of a lead single crystal. The experiments were done as a function of temperature from 82 K to a high temperature of 1086, 1211, and 507 K for Cu, Ag, and Pb, respectively. The {ital scrF} values were found by Moessbauer line-shape studies, and were used to correct the measured integrated intensities for thermal-diffuse scattering, so that accurate Debye-Waller factors (DWF`s) could be evaluated. The measured DWF`s for Cu, Ag, and Pb each have a significant anharmonic contribution at about 50% of the melting temperature ({ital T}{sub {ital m}}). Contrary to what Martin and O`Connor have reported for copper, we observed no {ital Q}{sup 4} contribution to the DWF within our experimental errors, which we estimate to be smaller than those reported by Martin and O`Connor.

• DOE Contract Number: FG02-85ER45199
• OSTI ID: 76415
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 1 Vol. 52; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER
DEBYE-WALLER FACTOR
ELASTIC SCATTERING
LEAD
MONOCRYSTALS
SILVER
TEMPERATURE DEPENDENCE