Degree Type
Dissertation
Date of Award
1992
Degree Name
Doctor of Philosophy
Department
Physics and Astronomy
First Advisor
Constantine Stassis
Abstract
Neutron diffraction techniques have been used to study the electronic structure of La[subscript]2NiO[subscript]4 and Sr[subscript]2CuO[subscript]2Cl[subscript]2 by measuring the antiferromagnetic form factor of the single-crystal samples at 15 K. The antiferromagnetic form factor was obtained from the integrated intensities of several magnetic reflections. In both cases, the experimentally determined form factor exhibits a plateau at low Q values (up to 3 A[superscript]-1), similar to that observed for La[subscript]2CuO[subscript]4. Detailed modelling of the experimental data of these three compounds suggests that the observed plateau may be accounted for by including the covalency effects in the Ni-O or Cu-O plane. The experimental data are also compared with spin-polarized band calculations.
DOI
https://doi.org/10.31274/rtd-180813-11319
Publisher
Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/
Copyright Owner
Xun-Li Wang
Copyright Date
1992
Language
en
Proquest ID
AAI9223978
File Format
application/pdf
File Size
159 pages
Recommended Citation
Wang, Xun-Li, "Neutron diffraction study of the electronic structure of high-T[subscript c] superconductor-related compounds " (1992). Retrospective Theses and Dissertations. 9964.
https://lib.dr.iastate.edu/rtd/9964
