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'''Distrontium ruthenate''', also known as '''strontium ruthenate''', is an [[oxide]] of [[strontium]] and [[ruthenium]] with the [[chemical formula]] Sr<sub>2</sub>RuO<sub>4</sub>. It was the first reported [[Perovskite (structure)|perovskite]] [[superconductor]] that did not contain [[copper]]. Strontium ruthenate is structurally very similar to the [[High-temperature superconductivity#Cuprates|high-temperature cuprate]] superconductors, and in particular, is almost identical to the [[lanthanum]] doped superconductor (La, Sr)<sub>2</sub>CuO<sub>4</sub>. However, the [[critical temperature|transition temperature]] for the superconducting phase transition is 0.93 [[Kelvin|K]] (about 1.5 [[Kelvin|K]] for the best sample), which is much lower than the corresponding value for cuprates.<ref name=Rev>{{cite journal |doi=10.1103/RevModPhys.84.253|title=Structure, Physical Properties, and Applications of SrRuO<sub>3</sub> Thin Films |year=2012 |last1=Koster |first1=Gertjan |last2=Klein |first2=Lior |last3=Siemons |first3=Wolter |last4=Rijnders |first4=Guus |last5=Dodge |first5=J. Steven |last6=Eom |first6=Chang-Beom |last7=Blank |first7=Dave H. A. |last8=Beasley |first8=Malcolm R. |journal=Reviews of Modern Physics |volume=84 |issue=1 |pages=253–298 |bibcode=2012RvMP...84..253K |url=https://research.utwente.nl/en/publications/structure-physical-properties-and-applications-of-srruo3-thin-films(1e2b4b92-c67d-4854-af92-6aab57227116).html }}</ref>
==Superconductivity==
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