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http://www.atechmagnet.com/magnetic-materials/2-disc-magnet-flat-magnets.html
Located in Beijing, China, Atech (HTXD) is a professional magnetic material manufacturer, dedicated to serving magnetic needs of global customers. With 25 years of experience of working with our customers for satisfying magnetic solutions, we have developed unsurpassed corporate strengths in product design, quality control and customer service. Equipped with state-of-art manufacturing facilities, our factory has an annual production capacity of 1000 tons permanent magnetic materials.We also provide soft and hard magnetic materials, magnet assembly, c channel magnets and small magnetic hooks.

There are four main types of magnets: ceramic (ferrite), AlNiCo, Samarium Cobalt (SmCo), and Neodymium (NdFeB). The latter is one of the most commonly used in motors for hybrids vehicles and EVs. Neodymium magnets have higher remanence, along with much higher coercivity and energy production, but often lower Curie temperature than other types.

Special neodymium magnet alloys that include terbium and dysprosium have been developed with higher Curie temperature, allowing them to tolerate higher temperatures of up to 200°C. Because of the RE magnet properties, no other magnet material can match their high strength performance. "You cannot really replace RE magnets," says Da Vukovich, president of Alliance LLC. "

Magnets are divided into two categories: Light Rare Earth (LRE) and Heavy Rare Earth (HRE). The global RE reserves consist of approximately 85% LRE and 15% HRE. The latter are the ones providing magnets rated at high temperature that are suitable in many automotive applications.

Around 9,200 gr of RE materials are used in Hybrid & EV which 8,900 gr is Nd.