What is a permanent magnet?

In particular, advanced permanent magnets—which maintain a large magnetic flux in the absence of a magnetizing field—underlie the operation of generators, alternators, eddy current brakes, motors, and relays.

Why do we need permanent magnets?

In particular, escalating demand for cheaper, smaller, and more powerful motors and generators for consumer, military, and energy applications such as wind turbines and hybrid or electric vehicles will require a steady and secure supply of high-energy-product permanent magnets.

What makes a permanent magnet remanent?

Specifically, in an ideal permanent magnet, a large remanent magnetic flux (“remanence” or B r) must be maintained in the absence of a magnetic field and be matched with a large resistance to demagnetization (“coercivity” or H c or intrinsic coercivity H ci).

What are the future applications of high-performance permanent magnets?

Among these, the markets of HEV and EV are growing at rapid rate to consume a large amount of the highest grade permanent magnets, and, wind power generators and other energy-generation or energy-storage devices are expected to be the near-future applications that also use a large volume of high-performance permanent magnets.

Could permanent magnets transform the world?

Provided by the Springer Nature SharedIt content-sharing initiative Permanent magnets constructed from metal ions and organic linkers using molecular design principles could bring transformative advances in areas such as energy conversion, transportation, and information storage.

What is a high-performance permanent magnet?

Introduction High-performance permanent magnets are one of the fundamental materials that support modern technologies in which electric energy is converted to motion, or vice versa, with the possibly highest efficiency.