The Freeness Theorem in Some Varieties of Linear Algebras and Rings

Abstract

The electron spin resonance spectrum of Cu2+ in NH,F was observed between 77 and 300K. No evidence was found of a iL transition in NH,F. The spin Hamiltonian parameters at 7 7 K were gx = 2.0771, gy = 2,1040 and gz = 2.4702 with the hyperfine parameters all less than 4 x cm-'. These parameters suggest that Cu" is in a tetrahedral site. Expressions obtained for the possible ground states suggest that the E" (B,) state is lowest.