  We demonstrate that in-plane charge current can effectively control the spin
precession resonance in an Al2O3/CoFeB/Ta heterostructure. Brillouin Light
Scattering (BLS) was used to detect the ferromagnetic resonance field under
microwave excitation of spin waves at fixed frequencies. The current control of
spin precession resonance originates from modification of the in-plane uniaxial
magnetic anisotropy field H_k, which changes symmetrically with respect to the
current direction. Numerical simulation suggests that the anisotropic stress
introduced by Joule heating plays an important role in controlling H_k. These
results provide new insights into current manipulation of magnetic properties
and have broad implications for spintronic devices.
