Electric field effects on polar-nanoregions in Li-doped KTa1-xNbxO3 single crystals probed by micro-Brillouin scattering. Issue 185 (22nd November 2017)

• Record Type: Journal Article
• Authors: Rahaman, M. M.; Imai, T.; Sakamoto, T.; Kojima, S.
• Is Part Of: Integrated ferroelectrics. Issue 185(2017)
• Page Start: 22
• Page End: 30
• Publication Date: 2017-11-22
• Subjects: KTN -- macro and nano-domains -- PNRs -- Brillouin scattering; Ferroelectric devices -- Periodicals; Integrated circuits -- Periodicals; 537.244805
• DOI: 10.1080/10584587.2017.1370282
• Languages: English
• ISSNs: 1058-4587

Abstract

ABSTRACT: The electric field effects on precursor dynamics in 5% Li-doped KTa1- x Nb x O3 (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, T C = 20°C. It can be caused by the co-existence of macro-domains and random nano-domains related to polar-nanoregions (PNRs). At E C = 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.