Local structure of YNi2B2C superconductor determined by x-ray-absorption spectroscopy
A. Yu. Ignatov, N. Ali, P. V. Konarev, M. Tischer, A. V. Tsvyashchenko, L. N. Fomicheva
DOI 10.1103/PhysRevB.61.3274 · Physical Review B
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Abstract
We have performed Ni K-edge extended x-ray-absorption fine structure measurements on YNi2B2C superconductor (Tc∼15.2 K) in the temperature range 5–220 K. The results show that local structure is distorted from a perfect I4/mmm crystalline structure expected from diffraction measurements below Tp∼60 K. Two different Ni-Ni distances separated by ∼0.09 Å may be extracted at 5 K. We argue that YNi2B2C is inhomogeneous at the atomic length scale and discuss a possible reason for the observed distortions.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 15.2 | Pressure not reported | unknown |
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