Extended x-ray-absorption fine-structure study of the position of Zr within the unit cell of Sm sub 2 Co sub 17

Journal Article · Mon Apr 15 00:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.347952· OSTI ID:5693570

Rabenberg, L ^[1]; Barrera, E V ^[2]; Maury, C E; Allibert, C H ^[3]; Heald, S M ^[4]

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1. Center for Materials Science and Engineering, The University of Texas at Austin, Austin, Texas 78712 (USA)
2. Department of Mechanical Engineering and Materials Science, Rice University, Houston, Texas 77251 (USA)
3. Laboratoire de Thermodynamique et PhysicoChimie Metallurgiques, associe au Centre National de la Recherche Scientifique (Unite associe 29), ENSEEG, B. P. 75, 38402 St. Martin-d'Heres, (France)
4. Materials Science Division, Brookhaven National Laboratory, Upton, New York 11973 (USA)

Extended x-ray-absorption fine-structure spectroscopy (EXAFS) has been used to determine the position of Zr within the unit cell of Sm{sub 2}Co{sub 17}. Induction-melted Sm{sub 2}Co{sub 17}:Zr ternary alloys, aged at 1180 {degree}C, then quenched, consisted of intimately mixed H2:17 and R2:17 having Zr in solid solution as well some regions of R2:17 that were poor in Zr. EXAFS spectroscopy of these specimens indicates that the most probable position for Zr is a site having 2 Sm near-neighbor atoms and 11 Co atoms distributed over three different interatomic distances. This is consistent with a direct substitution of Zr for Co in the Co site in the mixed planes (12{ital j} in {ital P}6{sub 3}/{ital mmc} or 18{ital f} in {ital R}3{ital m}).

• DOE Contract Number: AS05-80ER10742; AC02-76CH00016
• OSTI ID: 5693570
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 69:8; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
360104 -- Metals & Alloys-- Physical Properties
ALLOY SYSTEMS
ALLOYS
BINARY ALLOY SYSTEMS
COBALT ALLOYS
CRYSTAL STRUCTURE
ELEMENTS
FINE STRUCTURE
MAGNETIZATION
MAGNETS
METALS
PERMANENT MAGNETS
RARE EARTH ALLOYS
SAMARIUM ALLOYS
SPECTRA
STOICHIOMETRY
TRANSITION ELEMENTS
X-RAY SPECTRA
ZIRCONIUM
ZIRCONIUM ADDITIONS
ZIRCONIUM ALLOYS