What role do ferrites play in television deflection yokes?

In television technology, ferrites play a critical role as essential components in the deflection yoke assembly, which surrounds the neck of the picture tube.12

The primary function of these ceramic ferrites is to facilitate the control of electron-beam rastering, which is necessary for creating the image on the screen. Because soft ceramic ferrites possess high electrical resistance, they effectively reduce the occurrence of eddy currents—energy losses that would otherwise occur due to the rapidly fluctuating magnetic fields required to drive the deflection coils. By minimizing these losses, ferrites allow for the efficient operation of the deflection system, which uses electromagnetic coils to precisely steer the electron beam across the display.132

Additionally, the magnetic properties of these materials are utilized in associated fly-back transformers, which work in tandem with the deflection yoke to manage the high-voltage power supply required for the scanning process.12