A magnetic resonance study of iron in silver chloride
Garth, John Campbell
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https://hdl.handle.net/2142/23972
Description
Title
A magnetic resonance study of iron in silver chloride
Author(s)
Garth, John Campbell
Issue Date
1965
Doctoral Committee Chair(s)
Slichter, C.P.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
magnetic resonance
iron
silver chloride
cubic electric spin resonance spectrum
Electron Nuclear Double Resonance (ENDOR) technique
Language
en
Abstract
Th.e cubic electron spin resonance spectrum of Fe3+ in
silver chloride has been studied at 1.3°K by the Electron
Nuclear Double Resonance (ENDOR) technique. ENDOR lines
from 6 to 24 megacycles were observed on each of the five
electron spin resonance transitions and have been identified
as lines due to four chlorine nuclei which are nearest
neighbors to the iron ion.
The angular dependence of the crystal field splitting
of the electron resonance, as the orientation of the
applied field is varied, proves that the iron is in a site
of cubic symmetry. The an~ular variation of the ENDOR
spectrum, as the~ield is rotated in a (100) plane, shows
that the iron cannot be in a site of octahedral symmetry and
that it therefore must be in a site of tetrahedral symmetry.
ENDOR lines of both chlorine isotopes were identified.
C135 ENDOR lines, characterized by Ms = +3/2 and Ms = -3/2 0
were studied with the applied field parallel to the (100)
direction, and the best chlorine hyperfine and quadrupole
coupling .constants were determined for both isotopes. It is
found that these constants can be used to predict the
locations'of all observed C135 and C137 ENDOR lines, but
some discrepancies between the predicted spectrum and the
observed lines remain which cannot be accounted for by
effects of the cubic field splitting term in the spin- Hamiltonian.
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