  We demonstrate simultaneous detection of current driven antidamping-like and
field-like spin-orbit torques in heavy metal/ferromagnetic metal bilayers by
measuring all three magnetization components m_(x,) m_y, and m_z using the
vector magneto-optic Kerr effect. We have also implemented a self-calibration
method to accurately determine the effective fields of spin-orbit torques. With
this technique, we investigate the magnitude and direction of spin-orbit
torques in a series of platinum/permalloy samples. The values found are in
excellent agreement with results obtained via quadratic magneto-optic Kerr
effect, planar Hall effect, and spin transfer ferromagnetic resonance
measurements.
