Pierre-Ernest Weiss

Pierre Weiss
Albert Einstein, Paul Ehrenfest, Paul Langevin, Heike Kamerlingh Onnes and Pierre Weiss
Born	(1865-03-25)25 March 1865 Mulhouse
Died	24 October 1940(1940-10-24) (aged 75) Lyon
Nationality	French
Fields	Physics
Known for	Ferromagnetism

Pierre-Ernest Weiss (25 March 1865 – 24 October 1940) was a French physicist who developed the domain theory of ferromagnetism in 1907.Weiss domains and the Weiss magneton are named after him. Weiss also developed the Molecular or Mean field theory, which is often called Weiss-mean-field theory.

Weiss was born in Mulhouse and died in Lyon.