Common characteristics of displacive and relaxor ferroelectrics

0342160 - FZÚ 2011 RIV US eng J - Článek v odborném periodiku
Bishop, A. R. - Bussmann-Holder, A. - Kamba, Stanislav - Maglione, M.
Common characteristics of displacive and relaxor ferroelectrics.
Physical Review. B. Roč. 81, č. 6 (2010), 064106/1-064106/9. ISSN 1098-0121
Grant CEP: GA ČR(CZ) GA202/09/0682
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: relaxor ferroelectrics * soft modes * breather * displacive phase transition
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 3.772, rok: 2010

The long-standing classification scheme of ferroelectrics into either relaxor or displacive ones is too restrictive since a smooth crossover between them exists which even admits for a coexistence of both phenomena. This crossover and coexistence is a consequence of the varying density of polar nanoregions due to different doping levels of the respective system. The formatin of polar nanoregions is attributed here to intrinsic local modes in terms of discrete breathers.
Trvalý link: http://hdl.handle.net/11104/0184972