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Titolo:
SrBi2Ta2O9 has only two polar axes - a problem for high density ferroelectric memory devices
Autore:
Franke, K; Martin, G; Weihnacht, M; Sotnikov, AV;
Indirizzi:
Inst Solid State & Mat Res Dresden, D-01069 Dresden, Germany Inst Solid State & Mat Res Dresden Dresden Germany D-01069 sden, Germany AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia AF Ioffe Phys Tech Inst St Petersburg Russia 194021 sburg 194021, Russia
Titolo Testata:
SOLID STATE COMMUNICATIONS
fascicolo: 3, volume: 119, anno: 2001,
pagine: 117 - 119
SICI:
0038-1098(2001)119:3<117:SHOTPA>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRIC FORCE MICROSCOPY; CHEMICAL-VAPOR-DEPOSITION; PULSED-LASER DEPOSITION; THIN-FILMS; BEHAVIOR;
Keywords:
ferroelectrics; thin films; epitaxy; scanning force microscopy; dielectric response;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Franke, K Inst Solid State & Mat Res Dresden, Helmholtzstr 20, D-01069 Dresden, Germany Inst Solid State & Mat Res Dresden Helmholtzstr 20 Dresden Germany D-01069
Citazione:
K. Franke et al., "SrBi2Ta2O9 has only two polar axes - a problem for high density ferroelectric memory devices", SOL ST COMM, 119(3), 2001, pp. 117-119

Abstract

In the microscopic polarization-switching of SrBi2Ta2O9 (SBT) thin films, a significant proportion of the crystallites have proved to remain unswitchable. From the Curie-rule and from hysteresis measurements of SET material with uniform crystal orientation, it follows that SET posseses only two polar axes. The switchable polarization of polycrystalline films with different numbers of polar axes is simulated numerically. It is shown that SET capacitors with large-size electrodes may exhibit good switchability. However for high density memory applications, severe microstructural orientation requirements must be fulfilled to avoid switching failures. Materials with more than two polar axes make far reduced or no demands regarding texture quality. (C) 2001 Elsevier Science Ltd. All rights reserved.

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Documento generato il 01/12/20 alle ore 10:34:51