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Heat capacity and transport studies of the ferromagnetic superconductor RuSr2GdCu2O8

J. L. Tallon, J. W. Loram, G. V. M. Williams, C. Bernhard

DOI 10.1103/PhysRevB.61.R6471 · Physical Review B

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Abstract

Resistivity, thermoelectric power, and heat capacity are investigated in the ferromagnetic superconductor RuSr2GdCu2O8 with and without Zn substitution. The thermodynamic signatures of the ordering of the Ru moments and the paramagnetic Gd moments as well as the onset of superconductivity are all clearly seen and quantified. The materials are shown to exhibit bulk superconductivity which coexists with spatially uniform ferromagnetism. They appear to be typical underdoped superconducting cuprates in which the pseudogap dominates normal-state transport, thermodynamic, and substitutional properties. However, a field-induced increase in Tc could suggest some degree of triplet pairing.

Source-reported materials — not catalogue approval

FormulaReported Tc (K)Pressure (GPa)Type
RuSr2GdCu2O8

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46Pressure unresolvedonset
RuSr2GdCu2O8

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Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.

36Pressure unresolvedzero_resistance
RuSr2GdCu2O8

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Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.

46Pressure unresolvedonset
RuSr2GdCu2O8

Archive — visibility unverified

Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.

45Pressure unresolvedonset

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