Crystal-field splittings in the cubic Heusler alloys HoPd/sub 2/Sn and ErPd/sub 2/Sn

Journal Article · Wed Mar 01 04:00:00 EST 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.4119· OSTI ID:6481854

Li, W; Lynn, J W; Stanley, H B; Udovic, T J; Shelton, R N; Klavins, P

Neutron inelastic scattering measurements have been taken with triple-axis and time-of-flight techniques to determine the crystal-field levels of the rare-earth ions in the cubic Heusler alloys HoPd/sub 2/Sn and ErPd/sub 2/Sn. The observed excitations have been identified as crystal field in origin by their dispersionless character as well as by the temperature and wave-vector dependence of the intensities. Analysis of the data shows that the energies and intensities can be understood on the basis of a crystalline electric field with cubic point symmetry, with Lea, Leask, and Wolf parameters of W = 0.0287(4) meV and x = 0.3248(8) for HoPd/sub 2/Sn, and W = -0.0450(4) meV and x = 0.3022(6) for ErPd/sub 2/Sn. These parameters yield the magnetic triplet GAMMA/sub 5//sup (1)/ as the ground state for holmium, with magnetic moments of ( +- 5.49,0)..mu../sub B/, while the erbium ground state is the magnetic quartet GAMMA/sub 8//sup (3)/ with magnetic moments of ( +- 6.31, +- 1.33)..mu../sub B/. The crystal-field parameters for the other rare-earth elements have also been calculated by scaling to the values determined for HoPd/sub 2/Sn.

• Research Organization: Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742 and National Bureau of Standards, Gaithersburg, Maryland 20899
• OSTI ID: 6481854
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
ALUMINIUM ALLOYS
COHERENT SCATTERING
COPPER ALLOYS
COPPER BASE ALLOYS
CRYSTAL FIELD
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
ELEMENTS
ERBIUM ALLOYS
HEUSLER ALLOYS
HOLMIUM ALLOYS
MAGNETIC MOMENTS
MANGANESE ALLOYS
METALS
NEEL TEMPERATURE
NEUTRON DIFFRACTION
PALLADIUM ALLOYS
PALLADIUM BASE ALLOYS
PHYSICAL PROPERTIES
PLATINUM METAL ALLOYS
RARE EARTH ALLOYS
RARE EARTHS
SCATTERING
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TIN ALLOYS
TRANSITION TEMPERATURE