  The measured Hall angle in a ferromagnetic nanomagnet shows a substantial
non-linear dependence on an external magnetic field, which cannot be explained
by adopted mechanisms of the Ordinary and Anomalous (AHE) Hall effects implying
a linear plus constant dependence on the external magnetic field. We suggest
that there is an additional non-linear contribution from the Inverse Spin Hall
effect (ISHE). The significant contribution of ISHE in a ferromagnet is
supported by perfect agreement of experiment with a phenomenological theory of
ISHE. We observed different dependencies of AHE and ISHE on current suggesting
their different thermal dependencies. We also observe dependence of the Hall
angle of the current polarity which is due to the Spin Hall effect.
