Structural properties and phase transition of RFeMO (R = La, Nd; M = As, P) materials C. Ma, L. J. Zeng, H. X. Yang, H. L. Shi, R. C. Che, C. Y. Liang, Y. B. Qin, G. F. Chen, Z. A. Ren and J. Q. Li EPL, 84 4 (2008) 47002 Published online: 10 November 2008 DOI: 10.1209/0295-5075/84/47002