Magnetism and superconductivity in $M_{c}$Ta$_{2}$S$_{2}$C (M = Fe, Co, Ni, and Cu)

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dc.creatorSuzuki, Masatsugu
dc.creatorSuzuki, Itsuko S.
dc.creatorWalter, Jürgen
dc.date2004-02-19
dc.date2008-10-02
dc.date.accessioned2026-07-07T10:06:46Z
dc.date.available2026-07-07T10:06:46Z
dc.descriptionMagnetic properties of $M_{c}$Ta$_{2}$S$_{2}$C ($M$ = Fe, Co, Ni, Cu) have been studied using SQUID DC and AC magnetic susceptibility. In these systems magnetic $M^{2+}$ ions are intercalated into van der Waals gaps between adjacent S layers of host superconductor Ta$_{2}$S$_{2}$C. Fe$_{0.33}$Ta$_{2}$S$_{2}$C is a quasi 2D $XY$-like antiferromagnet on the triangular lattice. It undergoes an antiferromagnetic phase transition at $T_{N}$ (= 117 K). The irreversible effect of magnetization occurs below $T_{N}$, reflecting the frustrated nature of the system. The AF phase coexists with two superconducting phases with the transition temperatures $T_{cu} = 8.8$ K and $T_{cl} = 4.6$ K. Co$_{0.33}$Ta$_{2}$S$_{2}$C is a quasi 2D Ising-like antiferromagnet on the triangular lattice. The antiferromagnetic phase below $T_{N} = 18.6$ K coexists with a superconducting phase below $T_{cu} = 9.1$ K. Both Ni$_{0.25}$Ta$_{2}$S$_{2}$C and Cu$_{0.60}$Ta$_{2}$S$_{2}$C are superconductors with $T_{cu}$ ($= 8.7$ K for Ni and 6.4 K for Cu) and $T_{cl}$ (= 4.6 K common to $M_{c}$Ta$_{2}$S$_{2}$C). Very small effective magnetic moments suggest that Ni$^{2+}$ and Cu$^{2+}$ spins are partially delocalized.
dc.description15 pages, 17 figures, and 3 tables
dc.identifierhttps://arxiv.org/abs/cond-mat/0402501
dc.identifierhttp://arxiv.org/abs/cond-mat/0402501
dc.identifierPhys. Rev. B 71, 224407 (2005)
dc.identifierdoi:10.1103/PhysRevB.71.224407
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/170440
dc.subjectSuperconductivity
dc.titleMagnetism and superconductivity in $M_{c}$Ta$_{2}$S$_{2}$C (M = Fe, Co, Ni, and Cu)
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