Effect of Zn doping in under- and over-doped LaFe1−xCoxAsO systemYuke Li, Chenyi Shen, Yongkang Luo, Xiaojun Yang, Qian Tao, Guang-Han Cao and Zhu-An XuEPL, 102 3 (2013) 37003DOI: https://doi.org/10.1209/0295-5075/102/37003