Interplay of iron and rare-earth magnetic order in rare-earth iron pnictide superconductors under magnetic field

Yang Lei-Lei¹, Liu Da-Yong^{1, †,}, Chen Dong-Meng², Zou Liang-Jian^{1, 3, ‡,}

Evolution of magnetic structure on the magnetic field H ∥ a (a) and H ∥ c (b) in EuFe₂As₂. The red and blue arrows represent the spins of Eu and Fe, respectively. The long arrow indicates the increasing direction of magnetic field strength.