Accession Number : AD0780968

Title :   Crystalline Field Effects in Intermetallic Compounds.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA UNIV LOS ANGELES DEPT OF PHYSICS

Personal Author(s) : Davidov,D. ; Bucher,E. ; Rupp,L. W. , Jr. ; Longinotti,L. D. ; Rettori,C.

Report Date : SEP 1973

Pagination or Media Count : 36

Abstract : Electron spin resonance of the rare-earth ions Ce(+3), Dy(+3), Er(+3) and Yb(+3) has been observed in various cubic intermetallic compounds. Experimental results indicate the ground states to be (a) gamma 7 for Yb(+3) in LaPd3 (Cu3Au structure) (b) gamma 8 for Er(+3) in LaSb, LuSb, LaBi and LuBi (NaCl structure) (c) gamma 7 for Ce(+3) in LaSb (d) gamma 6 for Dy(+3) in LaSb (e) gamma 6 for Yb(+3) in LaSb (f) gamma 6 for Er in LaB6 (CaB6 structure). These data represent the first observations of anisotropic resonance and hyperfine structure in intermetallic compounds as well as the first observation of EPR of Ce(+3) in any metal. The observations are consistent with crystalline field parameters deduced from measurements of concentrated spin systems with the same structure, by means of other experimental techniques. Analysis of the crystalline field parameters in terms of the point charge model, the virtual bound state model and possible f-like contributions is given. (Author)

Descriptors :   *Electron paramagnetic resonance, *Rare earth elements, *Intermetallic compounds, Cerium, Dysprosium, Erbium, Ytterbium, Ground state, Atomic energy levels, Lanthanum compounds, Palladium alloys, Antimonides, Bismuth alloys, Borides

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE