resumo
Ferroelectric-like nanodomains have been written by applying voltage pulse of different durations to the surface of La0.89Sr0.11MnO3 manganite single crystals and subsequently examined by the piezoresponse force microscope (PFM) technique. The domain wall velocity was then calculated based on conventional PFM procedure. A transition from the non-activated to the activated type domain wall motion has been observed due to the inhomogeneous spatial variation of the tip-induced electric field. The maximum domain size that can develop in a non-activated motion process has been found to be similar to 170 nm. The formation of these ferroelectric-like nano domains at room temperature by PFM has been rationalized within phenomenological model based on Landau-Ginzburg formalism. Written domains are sufficiently stable and are attractive for device applications in nonvolatile random-access memories and development of metamaterials. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4746084]
palavras-chave
FERROELECTRIC DOMAIN; MANGANITES; NANOSCALE; ENERGY
categoria
Physics
autores
Panwar, N; Bdikin, IK; Morozovska, AN; Kholkin, AL
nossos autores
Andrei Kholkin
Investigador Principal
Neeraj Panwar
Bolseiro de pós-DoutoramentoProjectos
MULTIFOX: Nanometric Probing and Modification of Multiferroic Oxides (PTDC/FIS/105416/2008)
agradecimentos
The authors wish to acknowledge A. M. Balbashov for providing the LSMO-0.11 single crystals used in this study. One of the authors (N.P.) would like to thank Portuguese Foundation for Science and Technology (FCT) for the financial support through his postdoctoral grant (SFRH/BPD/71289/2010). Partial support by the FCT through the project PTDC/FIS/105416/2008 is gratefully acknowledged.