Magnetic phase transition in superconducting Sr2YRu0.95Cu0.05O6 observed by the 99Ru Mössbauer effect

Michael DeMarco; H. A. Blackstead; John D. Dow; M. K. Wu; D. Y. Chen; F. Z. Chien; Michael Haka; Steve Toorongian; Joel Fridmann

doi:10.1103/PhysRevB.62.14301

Magnetic phase transition in superconducting Sr2YRu0.95Cu0.05O6 observed by the 99Ru Mössbauer effect

Michael DeMarco, H. A. Blackstead, John D. Dow, M. K. Wu, D. Y. Chen, F. Z. Chien, Michael Haka, Steve Toorongian, Joel Fridmann

DOI 10.1103/PhysRevB.62.14301 · Physical Review B

T1

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Abstract

99Ru Mössbauer effect measurements at 4.2, 23, 30, and 40 K show that the hyperfine magnetic field vanishes near 30 K, lower than the superconducting onset temperature of 45 K in Sr2YRu0.95Cu0.05O6. The data confirm that superconductivity and homogeneous magnetic order coexist. The hyperfine magnetic field measured at 4.2 K is 58.5(0.8) T. The well-resolved set of 18 lines in the 4.2 K measurement enabled a determination of a new value, -0.293(0.005) nm, for the nuclear magnetic moment of the 3/2 state of 99Ru. The isomer shift in this compound was measured to be 0.13(0.01) mm/s and it is consistent with a +5 charge state of Ru.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sr2YRu0.95Cu0.05O6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	45	Pressure not reported	onset