Used in high-strength permanent magnets, especially in combination with neodymium and iron for applications in electric motors, wind turbines, and hard disk drives. Enhances the performance and thermal stability of neodymium-based magnets.

Employed in mischmetal for lighter flints due to its pyrophoric properties.

Added to glass and ceramics to produce yellow or green colors and to absorb ultraviolet light.

Used in didymium glass for protective welding goggles to filter out harmful sodium glare.

Applied in fiber optics as a dopant in amplifiers for signal boosting in telecommunications.

Utilized in catalytic converters and petroleum cracking catalysts.

Used in high-performance alloys to improve mechanical properties such as strength and corrosion resistance, particularly in aerospace and aviation applications.

Incorporated in nickel-metal hydride (NiMH) batteries to enhance capacity and performance.

Investigated for use in magnetic refrigeration systems due to its favorable magnetocaloric properties.