Dysprosium Separation Study Uses Magnetic Fields to Control Rare-Earth Extraction

Highlights

• Researchers combined solvent extraction with low-gradient permanent magnets to alter how quickly dysprosium, gadolinium, and neodymium move between liquids.
• Dysprosium showed the strongest magnetic response, with one orientation increasing extraction by ~12% and the opposite reducing it by ~30% versus no-magnet controls.
• Mixed dysprosium and yttrium experiments revealed clustering effects that limited magnetic selectivity, highlighting key challenges before industrial application.
• The work is covered by a U.S. provisional patent filed October 2025 and was sponsored by the U.S. Army Research Office.
• This laboratory-scale study demonstrates kinetic control of rare-earth extraction but does not yet establish commercial separation factors or cost advantages.