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Landau-Khalatnikov 방정식을 이용한 강유전 이력곡선과 펄스 스위칭 특성과의 비교
송태권,김명호 國立 昌原大學校 產業技術硏究院 2004 産技硏論文集 Vol.18 No.-
A phenomenological thermodynamics theory of Landau-Khalatnikov equation was used to study the relation between ferroelectric hysteresis loops and pulse switching current responses for the application of ferroelectric random access memory devices. Independent of hysteresis loop shape whether square or S-shape, the polarizations were switched within one-decade time interval but the characteristic switching times were much different. S-shaped hysteresis loop has longer switching time than square-shaped loop. These results confirm the Kolmogorov-Avrami-Ishibashi model in ferroelectric switching.