School of Materials Science and Engineering;
Northeastern University;
Shenyang 110004;
China;
State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization;
Baotou Research Institute of Rare Earths;
Baotou 014030;
China;
Room temperature ferromagnetism; Fe-Y oxide nano-cluster; Self-assembly; Oxygen vacancy; Rare earths;