  Traditionally, atomic spin orientation is achieved by the transfer of angular
momentum from polarised light to an atomic system. We demonstrate the mechanism
of orientation generation in room-temperature caesium vapours that combines
three elements: optical pumping, non-linear spin dynamics and spin-exchange
collisions. Through the variation of the spin-exchange relaxation rate, the
transition between an aligned and an oriented atomic sample is presented. The
observation is performed by monitoring the atomic radio-frequency spectra. The
measurement configuration discussed, paves the way to simple and robust
radio-frequency atomic magnetometers that are based on a single low power laser
diode that approach the performance of multi-laser pump-probe systems.
