Magnetic phase diagrams of the trilayers with the noncollinear coupling in
the form of the proximity magnetism model

    Shi-shen Yan and P. Grünberg 
    Institut für Festkörperforschung, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany 

    Liang-mo Mei 
    Physics Department, Shandong University, Jinan, Shandong 250100, People's Republic of China 

(Received 23 December 1999; accepted 6 April 2000) 

The magnetic phase diagrams of Fe/Mn/Fe trilayers with the noncollinear interlayer coupling in
the form of the proximity magnetism model were theoretically studied. The C+–C– phase
diagram in the remanent magnetization state predicts very rich spin configurations. The H–C+
and H–C– phase diagrams show that the spin configurations of Fe/Mn/Fe trilayers depend
strongly on the external magnetic field, the anisotropy of Fe layers, and the coupling coefficients
C+ and C–. Our experimental results of noncollinear spin configurations of Fe/Mn/Fe trilayers
strongly support the magnetic phase diagrams based on the proximity magnetism model. ©2000
American Institute of Physics.