Magnetic resonance at nuclei of rare-earth ions having a nonmagnetic doublet ground state

TL;DRAbstract

The possible observation of a magnetic resonance involving nuclei of rare earth ions whose electronic ground states are nonmagnetic GAMMA /sub 3/ doublets in cubic crystals is discussed. It is shown for the case of Tm/sup 3+/ ions that the magnetic-resonance spectrum is governed by dynamic as well as static interactions of ions with their surroundings. In the limiting case of wcak dynamic interactions, the magnetic-resonance spectrum of the Tm/sup 3+/ ion is described by a spin Hamiltonian having an effective spin of S=3/2. In the case of sufficiently strong dynamic interactions, the spin Hamiltonian has the usual form for spin I= 1/2. The theoretical predictions agree well with experimental NMR data for Tm/sup 169/ nuclei in the intermetallic compound TmAl/ sub 3/ (auth)

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