NEW RESULTS IN ZERO-FIELD PARAMAGNETIC RESONANCE (ZFPMR) OF TRIVALENT GADOLINIUM IN SEVERAL DIAMAGNETIC HOSTS

This research was sponsored under grants from the National Science Foundation, Army Research Office (Durham), Office of Naval Research, and the Research Corporation. $^{1}$E. R. Bernstein and G. H. Dobbs, Rev. Sci. Instrum. 44, 1314 (1973).Author Institution: Department of Chemistry, Princeton UniversityZero-field paramagnetic resonance (ZFPMR) $spectra^{1}$ for the ground S-state of trivalent gadolinium will be presented for a variety of diamagnetic hosts, including several ethylsulfates and several lattices having the fluorite structure. Special emphasis will be placed upon not only the zero-Field line shape, but also on new crystal field and hyperfine constants derived from zero-field spectra not previously available from conventional electron paramagnetic resonance spectra