Room temperature ferromagnetism in pure Y2O3 nanoparticles Zhonghua Zhu, Daqiang Gao, Guijin Yang, Jing Zhang, Jinlin Zhang, Zhenhua Shi, Feng Xu, Hua Gao and Desheng Xue EPL, 97 1 (2012) 17005 Published online: 03 January 2012 DOI: 10.1209/0295-5075/97/17005