0379817 - FZÚ 2013 RIV SG eng J - Článek v odborném periodiku
Hlinka, Jiří
Do we need the ether of polar nanoregions?
Journal of Advanced Dielectrics. Roč. 2, č. 2 (2012), "1241006-1"-"1241006-6". ISSN 2010-135X. E-ISSN 2010-1368
Grant CEP: GA ČR GAP204/10/0616
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: relaxors * ferroelectrics * diffuse scattering * polar nanoregions
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
DOI: https://doi.org/10.1142/S2010135X12410068

This paper deals with possible experimental signatures of the so-called polar nanoregions in lead-based perovskite relaxors. It outlines both traditional and alternative approaches to these signatures. It is argued that the concept of polar nanoregions is useful but largely speculative. Polar nanoregions are compared with ferroelectric nanodomains. Qualitative explanation of the principal "relaxor" properties of PMN are discussed in both frameworks. It is argued that polarization as a vector may not be well defined at any nanometric region in PMN Crystal.
Trvalý link: http://hdl.handle.net/11104/0210689