Tunneling and Spin-Lattice Relaxation of Hydrogen Dissolved in Scandium Metal

  • I. Svare
  • D. R. Torgeson
  • F. Borsa
Conference paper


The NMR spin-lattice relaxation data 1) for H in scandium metal solid solutions below 100 K have been reinterpreted in terms of local tunneling motion in two-well potentials rather than as classical over-the-barrier hopping. The asymmetry A between the wells strongly influences the electron- and phonon-induced tunneling transition rates and also the intensity of the relaxation in the two-level system. The fit to the data use distributions of A that broaden with increasing concentrations of H. For the local motion of H in Sc we find the sinusoidal barrier of height = 3200 K from inelastic neutron scattering 2), which gives the ground state tunnel splitting = 0.37 K. Then the coupling constants to electrons and phonons fitted to the spin relaxation are about the same as those for H in Nb 3), 4).


76.60 Es 61.70 Bv 66.30 Jt 


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Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • I. Svare
    • 1
  • D. R. Torgeson
    • 2
  • F. Borsa
    • 2
    • 3
  1. 1.Department of PhysicsUniversity of Trondheim, NTHTrondheimNorway
  2. 2.Ames Laboratory and Department of PhysicsIowa State UniversityAmesUSA
  3. 3.Department of Physics “A.Volta”Universita di PaviaPaviaItaly

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