Joseph Valasek
| Joseph Valasek | |
|---|---|
| Born | 27 April 1897 | 
| Died | 4 October 1993 (aged 96) | 
| Alma mater | Case School of Applied Science (BS) University of Minnesota (PhD) | 
| Known for | Discovery of ferroelectricity | 
| Scientific career | |
| Institutions | University of Minnesota | 
| Thesis | "Piezo-Electric and Allied Phenomena in Rochelle Salt" (1920) | 
Joseph Valasek (27 April 1897 – 4 October 1993) was an American physicist and professor emeritus of physics at the University of Minnesota. He specialized in geometrical and physical optics, experimental optics and spectroscopy, and x-rays. He is credited with the discovery of ferroelectricity, which he identified using Rochelle salts.