Magnetic and crystal-field properties of the magnetic superconductor DyNi2B2C from Dy161 Mössbauer spectroscopy
J. P. Sanchez, P. Vulliet, C. Godart, L. C. Gupta, Z. Hossain, R. Nagarajan
DOI 10.1103/PhysRevB.54.9421 · Physical Review B
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Abstract
We have utilized the Dy161 Mössbauer effect to investigate the magnetic properties and the nature of the ground state of the DyNi2B2C quaternary magnetic superconductor (TN∼11 K, Tc∼6 K). Detailed analysis of the spectra suggests that the magnetic transition is of first order and the Dy moments of 9.8μB at saturation are confined in the basal plane. Isomer shift in this material (∼0.5 mm/s) is significantly less than that observed in metallic Dy which implies charge transfer from 6s orbitals of Dy onto the strongly bonded C atoms. The second-order B20 crystal-field parameter is positive and estimated to amount to about 2 K. The ground-state crystal-field doublet is composed primarily of the |±1/2〉 component of the 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. © 1996 The American Physical Society.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| DyNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6 | Pressure not reported | onset |
| DyNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6 | Pressure not reported | onset |
| HoNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.5 | Pressure not reported | unknown |
| ErNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10.5 | Pressure not reported | unknown |
| TmNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11 | Pressure not reported | unknown |
| LuNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 16.5 | Pressure not reported | unknown |
| YNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 15.5 | Pressure not reported | unknown |
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