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Integrated Ferroelectrics
An International Journal
Volume 185, 2017 - Issue 1: The International Conference on Technologically Advanced Materials (ICTAM-2016), Part II
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Section D: Other Related Materials

Electric field effects on polar-nanoregions in Li-doped KTa1-xNbxO3 single crystals probed by micro-Brillouin scattering

M. M. RahamanGraduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan;Department of Materials Science and Engineering, University of Rajshahi, Rajshahi, BangladeshCorrespondence[email protected] [email protected]
,
T. ImaiNTT Corporation Device Innovation Center, Nippon Telegraph and Telephone Corporation, Atsugi, Kanagawa, Japan
,
T. SakamotoNTT Corporation Device Innovation Center, Nippon Telegraph and Telephone Corporation, Atsugi, Kanagawa, Japan
&
S. KojimaGraduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, JapanCorrespondence[email protected] [email protected]
Pages 22-30 | Received 07 Nov 2016, Accepted 22 Apr 2017, Published online: 12 Dec 2017
 
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ABSTRACT

The electric field effects on precursor dynamics in 5% Li-doped KTa1-xNbxO3 (KTN) were investigated under the zero field cooling (ZFC) and the externally applied dc field using micro-Brillouin scattering. The splitting of the transverse acoustic (TA) mode was found below the Curie temperature, TC = 20°C. It can be caused by the co-existence of macro-domains and random nano-domains related to polar-nanoregions (PNRs). At EC = 0.9 kV/cm, the switching of macro- and nano-domains was observed, at which the TA mode splitting disappeared. Under the electric field of 1.2 kV/cm, the enhancement of creation and growth of PNRs was also studied.

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