Magnetic Properties of Epitaxially-grown $SrRuO_3$ Nanodots

Gennadii Laskin, Hongguang Wang, Hans Boschker, Wolfgang Braun, Vesna Srot, Peter A. van Aken, Jochen Mannhart

Published 2019-02-01Version 1

We present the fabrication and exploration of arrays of nanodots of $SrRuO_3$ with dot sizes between 500 nm and 15 nm. Down to the smallest dot size explored, the samples were found to be magnetic with a maximum of the Curie temperature $T_C$ achieved by dots of 30 nm diameter. This peak in $T_C$ is associated with a dot-size-induced relief of the epitaxial strain, as evidenced by scanning transmission electron microscopy.