Neutron-scattering studies of Yb-bearing silicate glasses

Conference · Wed Sep 01 04:00:00 EDT 1993

OSTI ID:10180774

Ellison, A J.G.; Loong, C K; Wagner, J

The static and dynamic magnetic response of the Yb{sup 3+} ions in 2Na{sub 2}O{center_dot}Yb{sub 2}O{sub 3}{center_dot}6SiO{sub 2} glass and the isochemical crystalline silicate Na{sub 3}YbSi{sub 3}O{sub 9} has been studied by neutron diffraction, inelastic magnetic-scattering, and magnetic susceptibility measurements. The rare earth sites in the glass have an average coordination number of 5.6 {plus_minus} 0.5 and give a mean rare earth-oxygen bond length of 2.23 {Angstrom}; average Si-O and O-O coordination numbers and bond distances are comparable to those in vitreous SiO{sub 2}. The magnetic excitation spectrum of the Na{sub 3}YbSi{sub 3}O{sub 9} material was analyzed by a crystal-field model using a method of descending symmetry. The magnetic susceptibility and the excitation spectrum of the Yb glasses can be described by a distribution of ligand-field effects on the Yb{sup 3+} ions that are similar to the nominal crystal field in crystalline Na{sub 3}YbSi{sub 3}O{sub 9}.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10180774
• Report Number(s): ANL/MSD/CP--79820; CONF-9309142--1; ON: DE93019768
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602
CRYSTAL FIELD
GLASS
INELASTIC SCATTERING
LUTETIUM IONS
MAGNETIC SUSCEPTIBILITY
NEUTRON DIFFRACTION
SILICATES
SILICON OXIDES
SODIUM OXIDES
STRUCTURAL CHEMICAL ANALYSIS
STRUCTURE AND PHASE STUDIES
YTTERBIUM IONS
YTTERBIUM OXIDES