Max Planck Institute for Solid State Research , Heisenbergstrasse 1 , 70569 Stuttgart , Germany.
Nano Lett. 2019 Feb 13;19(2):1131-1135. doi: 10.1021/acs.nanolett.8b04459. Epub 2019 Jan 18.
We present the fabrication and exploration of arrays of nanodots of SrRuO with dot sizes between 500 and 15 nm. Down to the smallest dot size explored, the samples were found to be magnetic with a maximum Curie temperature T achieved by dots of 30 nm diameter. This peak in T is associated with a dot-size-induced relief of the epitaxial strain, as evidenced by scanning transmission electron microscopy.
我们展示了 SrRuO 纳米点阵列的制备和研究，其点的尺寸在 500 到 15nm 之间。在研究的最小点尺寸下，这些样品被发现具有磁性，最大居里温度 T 由 30nm 直径的点实现。这种 T 的峰值与外延应变的点尺寸诱导缓解有关，这一点可以通过扫描透射电子显微镜得到证明。
