pyromagnetism
/ˌpʌɪrə(ʊ)ˈmaɡnɪtɪz(ə)m/Physics
noun
The property displayed by certain crystalline substances of exhibiting a magnetic moment when heated (the effect being reversed on cooling).
Origin
Early 20th century; earliest use found in Scientific Abstracts. From pyro- + magnetism, after German Pyromagnetismus.