Interaction of the spin-flop phase and superconductivity in DyMo6S8 single crystals
K. Rogacki, E. Tjukanoff, S. Jaakkola
DOI 10.1103/PhysRevB.64.094520 · Physical Review B
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Abstract
Single crystals of DyMo6S8 are studied by magnetization measurements performed in low magnetic fields and at temperatures below the superconducting transition temperature Tc=1.6 K. Effects have been found at temperatures below TN=0.4 K, where superconductivity and antiferromagnetic order coexist. These effects reflect the unusual vortex dynamics characterizing the quasistatic magnetization process. The two-stage flux penetration is observed and interpreted as a result of the spin-flop phase developed in the superconducting state. The superconducting coherence length ξ(0.1 K)≃500 Å and the Ginzburg-Landau parameter κ(0.1 K)≃2.5 have been estimated in the magnetic superconducting state through analysis of the magnetization process. The significant reduction of κ, from 11 obtained just above TN to about 2.5 below TN, demonstrates the tendency of the compound to transform from a type-II to a type-I superconductor due to the appearance of long-range magnetic order in the superconducting state.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| DyMo6S8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.6 | Pressure not reported | onset |
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