High Temperature Instabilities in Sr0.75Ba0.25Nb2O6 Ferroelectric Relaxor
-oriented tungsten bronze type Sr0.75Ba0.25Nb2O6 uniaxial relaxor ferroelectric single crystals have been examined by the temperature dependent complex capacitance study. The capacitance dispersion maximum temperature was observed at T~58 oC with strong frequency dependence above and below this temperature. At temperatures T>Tmax three additional instabilities were exhibited by the complex capacitance in the unpoled crystal during heating cycle whereas these instabilities could not be seen in the subsequent cooling cycle. Similarly these instabilities disappeared upon poling the crystal at room temperature. These additional high temperature instabilities of the metastable character were associated to different kinds of random inhomogeneous structures trapped in strong random field matrix of SBN-x uniaxial relaxor.
S.-E. Park and T.R. Shrout, â€œUltrahigh strain and piezoelectric behavior in relaxor based ferroelectric single crystalsâ€, J. Appl. Phys. vol. 82, pp. 1804-1811, 1997.
A.M. Glass, â€œInvestigation of the electrical properties of Sr1âˆ’xBaxNb2O6 with special reference to pyroelectric detectionâ€. J. Appl. Phys., vol. 40, pp. 4699-4713, 1969.
J. Dec, W. Kleemann, Th. Woike and R. Pankrath, â€œPhase transition in Sr0.61Ba0.39Nb2O6:Ce3+: I. Susceptibility of clusters and domainsâ€, Eur. Phys. J., vol. B14, pp. 627-632, 2000.
J. Dec, W. Kleemann, V.V. Shvartsman, D.C. Lupascu and T. Åukasiewicz, â€œMesoscopic to global polar order in the uniaxial relaxor ferroelectric Sr0.8Ba0.2Nb2O6â€, Appl. Phys. Lett., vol. 100, pp. 052-903, 2012.
F. Prokert, H. Ritter and J. Ihringer, â€œX-ray diffraction study of phase transitions in Sr0.75Ba0.25Nb2O6 between 20 K and 400 Kâ€, K. Ferroelectric Lett., vol. 24, pp. 1-7, 1998.
A.S. Bhalla, R. Guo, L.E. Cross, G. Burns, F.H. Dacol and R.R. Neurgaonkar, â€œMeasurements of strain and optical indices in the ferroelectric Ba0.4Sr0.6Nb2O6â€, Polarization effects, Phys. Rev. B, vol. 36, pp. 2030-2035, 1987.
F.M. Jiang, J.-H. Ko and S. Kojima, â€œCentral peaks and Brillouin scattering in uniaxial relaxor single crystals of Sr0.61Ba0.39Nb2O6â€, Phys. Rev. B, vol. 66, pp.184-301, 2002.
J.-H. Ko and S. Kojima, â€œIntrinsic and extrinsic central peaks in the brillouin light scattering spectrum of the uniaxial ferroelectric relaxor Sr0.61Ba0.39Nb2O6â€, Appl. Phys. Lett., vol. 91, pp. 082-903, 2007.
M. Aftabuzzaman, M.A. Helal, J. Dec, W. Kleemann and S. Kojima, â€œElectric Field Effect on Elastic Properties of Uniaxial Relaxor SrxBa1-xNb2O6 Single Crystals with Strong Random Fieldsâ€, Jap. J. Appl. Phys., vol. 56, 10PC06, 2017.
E. Dulâ€™kin, S. Kojima and M. Roth, â€œDielectric maximum temperature non-monotonic behavior in uniaxial Sr0.75Ba0.25Nb2O6 relaxor seen via acoustic emissionâ€, J. Appl. Phys., vol. 110, pp. 044106, 2011.
E. Dulâ€™kin, S. Kojima and M. Roth, â€œLow temperature anomalous Field Effect in SrxB1-xNb2O6 uniaxial relaxor ferroelectric seen via acoustic emissionâ€, J. Appl. Phys., vol. 111, pp. 084101, 2012.
A.M. Pugachev, I.V. Zaytseva, V.K. malinovsky, N.V, Surovtsev, L.I. Ivleva and P.A. Lykov, â€œStudying the non-linear optical response from local polar in homogeneities in strontium barium niobate crystals of different chemical compositionâ€, Bull. Russ. Acad. Sci. Phys., vol. 82, pp. 261-265, 2018.
L.K. Chao, E.V. Colla, M.B. Weissman and D. Viehland, â€œAging and slow dynamics in SrxBa1-xNb2O6â€, Phy. Rev. B, vol. 72, pp. 134105, 2005.
A.A. Bokov and Z.-G. Ye, â€œRecent Progress in Relaxor Ferroelectrics with perovskite structureâ€, J. Mater. Sci., vol. 41, pp. 31-52, 2006.