Neodymium-Iron-Boron (NdFeB) Magnet

Category: Science and Technology | Critical Minerals | Clean Energy

UPSC Notes

Neodymium-iron-boron magnets are powerful permanent magnets made primarily from neodymium, iron and boron. They are among the strongest commercially available permanent magnets for their size and are essential in many compact, high-performance electrical devices.

Some formulations also use other rare-earth elements, such as dysprosium or terbium, to improve performance at elevated temperatures.

Key Pointers

  • Composition: Neodymium (Nd), iron (Fe) and boron (B).

  • Type: Permanent magnet.

  • Properties: High magnetic strength and energy density.

  • Applications: Electric-vehicle motors, wind turbines, robotics, hard drives, speakers and industrial equipment.

  • Strategic importance: Critical to clean-energy technologies and advanced manufacturing.

  • Supply-chain issue: Mining, separation and refining of rare-earth elements are geographically concentrated.

  • Indian relevance: Domestic rare-earth processing, recycling and strategic mineral security.

  • Related policy: National Critical Minerals Mission.

UPSC relevance: Energy transition, critical minerals, import dependence and strategic supply chains.