Soft X-ray appearance potential study of rare earth-manganese compounds

Journal Article · Thu Jun 10 00:00:00 EDT 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.59265· OSTI ID:21207991

Chourasia, A R ^[1]; Deshpande, S D ^[2]

---

1. Department of Physics, Texas A and M University-Commerce, Commerce, Texas 75429 (United States)
2. National Research Institute for Metals, 1-2-1 Sengen Tsukuba, 305-0047 (Japan) and S. S. G. M. College of Engineering, Shegaon (C. Rly.) 444203 (India)

Soft X-ray appearance potential spectroscopy (SXAPS) has been employed to study the changes in the electronic structure of RMn{sub 2} compounds (where R=Pr, Sm, Gd and Dy). In this technique the total x-ray emission associated with the thresholds for the excitation of core levels of the atoms in the surface region of the materials is measured. The SXAPS spectra of the Mn L{sub 2,3} levels in these intermetallics are compared with the corresponding elemental manganese spectrum. The normalized spectra exhibit an increasing trend in the unoccupied density of states at the Fermi level as the atomic number of R increases. This has been interpreted as increasing hybridization between the R 5d and Mn 3d bands. The hybridization is found to influence the magnetic properties of these intermetallics. The core levels are also found to display crystal field splitting that seems to disappear for DyMn{sub 2}. This correlates very well with the disappearance of the Mn magnetic moment at Dy in these intermetallics.

• OSTI ID: 21207991
• Journal Information: AIP Conference Proceedings, Vol. 475, Issue 1; Conference: 15. international conference on the application of accelerators in research and industry, Denton, TX (United States), 4-7 Nov 1998; Other Information: DOI: 10.1063/1.59265; (c) 1999 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
CRYSTAL FIELD
DYSPROSIUM
ELECTRONIC STRUCTURE
EMISSION SPECTRA
ENERGY-LEVEL DENSITY
EXCITATION
FERMI LEVEL
GADOLINIUM
INTERMETALLIC COMPOUNDS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MANGANESE
POTENTIALS
PRASEODYMIUM
QUANTITATIVE CHEMICAL ANALYSIS
SAMARIUM
SOFT X RADIATION
X-RAY SPECTROSCOPY