Magnetic frustration in double perovskite LaSrNiRuO6 Xuedong Ou, Fengren Fan, Xiangtuo Chen, Tao Li, Lixiang Jiang, Alessandro Stroppa, Xiaoping Ouyang and Hua Wu EPL, 123 5 (2018) 57003 Published online: 05 October 2018 DOI: 10.1209/0295-5075/123/57003