  We present here a new parametric resonance magnetometer scheme based on
elliptically polarized pumping light and two radio-frequency fields applied
along the two optical pumping directions. At optimum ellipticity and
radio-frequency fields amplitudes the three components of the magnetic field
are measured with an isotropic sensitivity. Compared to the usual
alignment-based parametric resonance magnetometers, the sensitivity is degraded
by a factor 2 for two components of the magnetic field but improved by a factor
11 for the third one. This new magnetometer configuration could be particularly
interesting for geophysics and biomedical imaging.
