Theory of the Nuclear Magnetic Resonance of Co^<59> in CoO
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The NTMR of Co^<59> in CoO is calculated, taking into account the interaction between the nuclear spin and the spin moment and residual orbital moment of the cobalt ion, beside the Fermi-type hyperfine interaction. The calculated frequency is 1028Mc. The interaction between the nuclear quadrupole moment, Q, and the electric field gradient at the nucleus splits this resonance line into seven equally spaced lines. For a assumed value of Q = 0.5 × 10^<-24>cm^<-1>, the line splitting is 6Mc. The dependence of the frequency of the resonance lines on the direction of the applied field is also investigated. It is shown that by observing this dependence the angle of inclination of the spin axis to the tetragonal axis can be deduced. Further, theory of the indirect coupling between nuclear spins through hyperfine interaction and exchange interaction is developed, using the molecular field approximation. The line width arising from this indirect coupling is estimated to be 0.115Mc, which is small compared with the line splitting.
- 社団法人日本物理学会の論文
- 1960-05-05
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