Stress Anisotropy Dependent Ferromagnetic Resonance Frequency in Ferromagnetic/Antiferromagnetic Bilayers

The effect of stress anisotropy on ferromagnetic resonance frequency is investigated in ferromagnetic/antiferromagnetic bilayers with exchange anisotropy and uniaxial magnetocrystalline anisotropy. The intensity and the direction of applied magnetic field dependence of resonant frequencies are studied for different stress anisotropies. It is shown that resonant frequency can be tunable by the intensity and the direction of the stress anisotropy. Moreover, the easy axis and hard axis can be changed significantly by taking into account stress anisotropy field and exchange anisotropy field. The jump phenomenon in the angular dependence of stress anisotropy has been explained by analyzing the magnetization reversal processes.