Magnetic and crystal-field properties of the magnetic superconductor DyNi{sub 2}B{sub 2}C from {sup 161}Dy M{umlt o}ssbauer spectroscopy

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.9421· OSTI ID:383845

Sanchez, J P ^[1]; Vulliet, P ^[1]; Godart, C ^[2]; Gupta, L C; Hossain, Z; Nagarajan, R ^[3]

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1. Departement de Recherche Fondamentale sur la Matiere Condensee, Commissariat a l`Energie Atomique/Grenoble, 17 rue des Martyrs, 38054 Grenoble Cedex 9 (France)
2. CNRS, UPR-209, Place A. Briand, 92195 Meudon Cedex (France)
3. Tata Institute of Fundamental Research, Bombay 400005 (India)

We have utilized the {sup 161}Dy M{umlt o}ssbauer effect to investigate the magnetic properties and the nature of the ground state of the DyNi{sub 2}B{sub 2}C quaternary magnetic superconductor ({ital T}{sub {ital N}}{approximately}11 K, {ital T}{sub {ital c}}{approximately}6 K). Detailed analysis of the spectra suggests that the magnetic transition is of first order and the Dy moments of 9.8{mu}{sub {ital B}} at saturation are confined in the basal plane. Isomer shift in this material ({approximately}0.5 mm/s) is significantly less than that observed in metallic Dy which implies charge transfer from 6{ital s} orbitals of Dy onto the strongly bonded C atoms. The second-order {ital B}{sup 0}{sub 2} crystal-field parameter is positive and estimated to amount to about 2 K. The ground-state crystal-field doublet is composed primarily of the {vert_bar}{plus_minus}1/2{r_angle} component of the {ital J}=15/2 free ion term. Higher-order crystal-field terms should be included in the exchange crystal-field Hamiltonian for a detailed account of the experimental results. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 383845
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 13 Vol. 54; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL FIELD
DYSPROSIUM BORIDES
DYSPROSIUM CARBIDES
ELECTRIC CONDUCTIVITY
ELECTRONIC STRUCTURE
MAGNETIC PROPERTIES
MOESSBAUER EFFECT
NICKEL BORIDES
NICKEL CARBIDES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TRANSITION TEMPERATURE