Unexpected EB in La manganite films

Exchange-bias effect at La0.75Sr0.25MnO3/LaNiO3 interfaces
J. C. Rojas Sánchez, B. Nelson-Cheeseman, M. Granada, E. Arenholz, and L. B. Steren
Phys. Rev. B 85, 094427 (2012)

(a) Ni L2,3 and (b) Mn L2,3 XAS and XMCD spectra for LSMO tLSMO/LNO 8nm/LSMO//STO trilayers with (dash) tLSMO = 2.2 nm, (dot) tLSMO = 4.2nmand(solid) tLSMO = 8.1 nmrespectively. (c)Ni and (d)Mn normalized XMCD asymmetry vs. magnetic field.