Overview: Explores a wholly new field of active device structures and operation..With the current absence of text in this area, it fulfills a fundamental needIt has been more than 80 years since Valasek first recognized the existence of a dielectric analogue to ferromagnetism, ferroelectricity, in Rochelle salt. Much as with semiconductor research, the initial studies of ferroelectric materials focused on homogeneous materials. Unlike semiconductor research, however, which rapidly expanded into n- homogeneous structures and devices, investigations of compositionally graded and layered ferroele
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