Apparatus for providing a magnetic field within a process chamber are provided herein. In some embodiments, an apparatus for providing a magnetic field within a process chamber includes: an inner rotating mechanism including a first plate having a central axis, wherein the first plate includes and a first plurality of magnets and is rotatable about the central axis; and an outer lifting mechanism including a ring disposed proximate the first plate, the ring having a second plurality of magnets coupled to a bottom surface of the ring proximate the peripheral edge of the ring, wherein the ring is movable in a direction perpendicular to the first plate.