Deng Heng, Yang Chang-Ping, Huang Chang, Xu Ling-Fang. Magnetically correlated I-V nonlinearity and electrical transport property of the double-layered perovskite La1.8Ca1.2Mn2O7 compoundJ. Acta Physica Sinica, 2010, 59(10): 7390-7395. DOI: 10.7498/aps.59.7390