Stress Anisotropy Dependent Ferromagnetic Resonance Frequency in Ferromagnetic/Antiferromagnetic Bilayers

H. Wanga, J.H. Rongb, G.H. Yunb, c, L.B. Baob aCollege of Science, Inner Mongolia Agricultural University, Hohhot 010018, P.R. China bInner Mongolia Key Lab of Nanoscience and Nanotechnology and School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, P.R. China cCollege of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot 010022, P.R. China

Received: January 18, 2019; revised version July 15, 2019; in final form July 29, 2019

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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.

DOI:10.12693/APhysPolA.136.405 topics: ferromagnetic resonance, exchange anisotropy, stress anisotropy