Interplay of iron and rare-earth magnetic order in rare-earth iron pnictide superconductors under magnetic field
Yang Lei-Lei1, Liu Da-Yong1, †, , Chen Dong-Meng2, Zou Liang-Jian1, 3, ‡,
       

Dependence of the total magnetization on magnetic field (a) Ha and (b) Hc of SmFeAsO.