?sR studies of superconductivity in eutectically grown mixed ruthenates

Shiroka, T. and Fittipaldi, R. and Cuoco, M. and De Renzi, R. and Maeno, Y. and Lycett, R.J. and Ramos, Silvia and Forgan, E.M. and Baines, C. and Rost, A. and Granata, V. and Vecchione, A. (2012) ?sR studies of superconductivity in eutectically grown mixed ruthenates. Physical Review B - condensed matter and materials physics, 85 (13). p. 134527. ISSN 1098-0121. (doi:https://doi.org/10.1103/PhysRevB.85.134527) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1103/PhysRevB.85.134527

Abstract

The low-temperature magnetic behavior of the double-layered ruthenate Sr 3Ru 2O 7, as grown from a eutectic Sr 2RuO 4-Sr 3Ru 2O 7 system, was investigated via zero- and transverse-field muon-spin rotation. The gradual increase of the muon relaxation rate observed below 2.5 K, even in the absence of applied magnetic fields, indicates the occurrence of a spontaneous breaking of time-reversal symmetry. The onset of the latter at a temperature above 1.5 K, the T c of the single phase Sr 2RuO 4, provides evidence about an unconventional superconducting state in the eutectic phase, which most likely takes place at the interface between the Sr 2RuO 4 and Sr 3Ru 2O 7 domains, or even inside the Sr 3Ru 2O 7 phase. We show that the superconducting state manifests a two-component behavior in the transverse-field response with change-over at about T=2.5 K and T=1.5 K. The comparison with zero-field μSR data in the Ru-Sr 2RuO 4 eutectic system rules out the possibility of spurious effects due to embedded Ru islands.

Item Type: Article
Subjects: Q Science > QC Physics > QC176 Solid state physics
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Silvia Ramos
Date Deposited: 28 Apr 2015 10:40 UTC
Last Modified: 10 Dec 2017 12:50 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46983 (The current URI for this page, for reference purposes)
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