ISSN:
1572-9605
Keywords:
Sr2RuO4
;
Sr2RuO4–Ru eutectic
;
upper critical field
;
quasi-two-dimensional superconductor
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics
Notes:
Abstract The superconducting transition temperature, T c , of the impurity-free, intrinsic Sr2RuO4 is as high as 1.50 K. However, we recently showed that T c is remarkably increased up to 3 K in the Sr2RuO4–Ru eutectic system, in which plate-like microdomains of Ru metal are embedded in the primary-phase Sr2RuO4. The phase diagram of the anisotropic upper critical field of the 3-K phase indicates that H c2 for the field parallel to the RuO2 plane is strongly suppressed at low temperatures. We argue that the reorientation of the Cooper-pair spin direction near the Sr2RuO4–Ru interface may be responsible for this suppression. In addition, we observed unusual hysteresis in the out-of-plane resistivity, ρ c , at low temperatures and near H c2, only when the field was applied parallel to the RuO2 plane.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1007700721913
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