Skip navigation

Please use this identifier to cite or link to this item:
Title: The noise of many needles: Jerky domain wall propagation in PbZrO3 and LaAlO3
Authors: Puchberger, Sabine
Soprunyuk, Viktor P.
Schranz, Wilfried T.
Tröster, Andreas
Roleder, Krystian
Majchrowski, Andrzej
Carpenter, Michael Allan
Salje, Ekhard Karl Hermann
Keywords: Needles; PbZrO3; LaAlO3; Lanthanum alloys
Issue Date: 2017
Citation: APL Materials, (Vol. 5, iss. 4 (2017), art. no 046102, s. 1-8
Abstract: Measurements of the sample length of PbZrO3 and LaAlO3 under slowly increasing force (3-30 mN/min) yield a superposition of a continuous decrease interrupted by discontinuous drops. This strain intermittency is induced by the jerky movement of ferroelastic domain walls through avalanches near the depinning threshold. At temperatures close to the domain freezing regime, the distributions of the calculated squared drop velocity maxima N(υm2) follow a power law behaviour with exponents ε=1.6±0.2. This is in good agreement with the energy exponent ε=1.8±0.2 recently found for the movement of a single needle tip in LaAlO3 [R. J. Harrison and E. K. H. Salje, Appl. Phys. Lett. 97, 021907 (2010)]. With increasing temperature, N(υm2) changes from a power law at low temperatures to an exponential law at elevated temperatures, indicating that thermal fluctuations increasingly enable domain wall segments to unpin even when the driving force is smaller than the corresponding barrier.
DOI: 10.1063/1.4979616
ISSN: 2166-532X
Appears in Collections:Artykuły (WNŚiT)

Files in This Item:
File Description SizeFormat 
Puchberger_The_noise_of_many_needles.pdf1,74 MBAdobe PDFView/Open
Show full item record

Uznanie Autorstwa 3.0 Polska Creative Commons License Creative Commons