Investigation of the structure of β-tantalum

Document Type

Article

Publication Date

8-1-2003

Abstract

The local structure of β-tantalum was investigated by comparing experimental extended X-ray absorption fine structure (EXAFS) measurements with calculated spectra of proposed models. Four possible structure candidates were examined: a β-Uranium based structure, a distorted A15 structure, a bcc-Ta based superlattice structure with N interstitials and a simple hcp structure. The local structural measurements were found to be consistent with the β-Uranium based model containing 30 atoms per unit cell and having the space group P42/mnm. The thermal effect analysis on X-ray diffraction and EXAFS spectra, which reveals that β-Ta is highly disordered, agrees with the low symmetry and anisotropic system of the β-U model. © 2003 Elsevier Science B.V. All rights reserved.

Identifier

0038448109 (Scopus)

Publication Title

Thin Solid Films

External Full Text Location

https://doi.org/10.1016/S0040-6090(03)00702-8

ISSN

00406090

First Page

116

Last Page

122

Issue

1-2

Volume

437

Fund Ref

U.S. Department of Energy

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