Electron microscopy
  
History of Ferroelectricity
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Table 3347. History of ferroelectricity.

Year
Event
1921
 Discovered by Valasek in a complex compound (rochelle salt) [1,2]
1935
 Ferroelectricity was observed in potassium dihydrogen phosphate (KH2PO4)
1941 (War II)
The most popular and classical ferroelectric material BaTiO3 was discovered

 

 

[1] J. Valasek, Phys. Rev., 17, 475–81, (1921).
[2] G. H. Haertling, J. Amer. Ceram. Soc., 82, 797, (1999).

 
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