Ferromagnetism and Conductivity in Atomically Thin SrRuO_{3}

Abstract

Atomically thin ferromagnetic and conducting electron systems are highly desired for spintronics, because they can be controlled with both magnetic and electric fields. We present (SrRuO_{3})_{1}−(SrTiO_{3})_{5} superlattices and single-unit-cell-thick SrRuO_{3} samples that are capped with SrTiO_{3}. We achieve samples of exceptional quality. In these samples, the electron systems comprise only a single RuO_{2} plane. We observe conductivity down to 50 mK, a ferromagnetic state with a Curie temperature of 25 K, and signals of magnetism persisting up to approximately 100 K.