Amorphous magnet

[1] Three common types of amorphous magnetic phases are asperomagnetism, speromagnetism and sperimagnetism, which correspond to ferromagnetism, antiferromagnetism and ferrimagnetism, respectively, of crystalline solids.

Spin glass models can present these amorphous types of magnetism.

[2] Due to random frustration, amorphous magnets possess many nearly degenerate ground states.

[1][4][a] Asperomagnetism is the equivalent of ferromagnetism for a disordered system with random magnetic moments.

[2][5] Speromagnetism is the equivalent of antiferromagnetism for a disordered system with random magnetic moments.

Schematic representation of a crystalline ferromagnetic phase (top) and a disordered phase of an amorphous magnet (bottom)