Kimball, Clyde W.
M.S. (Master of Science)
Department of Physics
Rare earth metal compounds||Superconductors--Chemistry
Mossbauer studies on ⁵⁷Fe-doped REBa₂Cu₃O₇_δ (RE=Er,Dy) were conducted with Fe concentration at 0.15 and 0.30. The results show that the magnetic behavior of the ⁵⁷Fe dopants, which mainly occupy Cu(l) sites, changes dramatically as the magnitude of the rare earth moment varies. The dimensionality of the magnetic interaction changes from 2D to 3D when the rare earth substitute changes from Er to Dy. The line-widths of the Mossbauer subspectra characterize the fluctuation behavior of the magnetic phase transition in the vicinity of T[sub N]. The magnitude of the rare earth moments appears to play a dominant role in the magnetic interaction of Fe dopants in these compounds.
Liang, Yuehai, "A Mossbauer study of REBa₂Cu₃₋xFexO₇₊δ (RE=Er,Dy;x=0.15,0.30) superconducting oxides" (1991). Graduate Research Theses & Dissertations. 415.
vii, 63 pages
Northern Illinois University
Rights Statement 2
NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.