Nuclear-magnetic-resonance investigation of the itinerant nearly antiferromagnetic behavior in superconducting Zr2(Co1−xNix)
M. Takekuni, H. Sugita, S. Wada
DOI 10.1103/PhysRevB.58.11698 · Physical Review B
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Abstract
Nuclear magnetic resonance of 59Co in superconducting Zr2(Co1−xNix) compounds was carried out at 75 MHz in a temperature range between 1.4 and 260 K to study the properties of the low-frequency spin dynamics. A temperature-independent Knight shift and an approximate Curie Weiss behavior of the nuclear spin-lattice relaxation rate are well explained within a framework of the self-consistent renormalization theory of spin fluctuations for nearly antiferromagnetic (AF) metals. Results of the Ni substitution for Co indicate that the superconducting transition temperature relates more to the spin density fluctuations around q=Q (Q being an AF wave vector) than to the density of states at the Fermi level.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Zr2Co Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | unknown |
| Zr2Ni Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.4 | Pressure not reported | unknown |
| Zr2Co Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.5 | Pressure not reported | onset |
| Zr2(Co0.85Ni0.15) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6 | Pressure not reported | onset |
| Zr2(Co0.6Ni0.4) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.2 | Pressure not reported | onset |
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