A new method for determining the coordinate dependences of the pyroelectric current in ferroelectric materials

The Pyroelectric Properties of SBN Crystals with Different Composition

“…Consequently these crystals will be labeled as SBN26, SBN35, SBN50, SBN61, and SBN75, respectively. The real composition, as determined using the Inductively The pyroelectric effect and influence of thermocycling on the polarization state in the SBN crystals was examined by two methods: the dynamic pyroelectric measurement and thermal square wave (TSW) method [14,15]. The single frequency TSW method is based on the analysis of the pyroelectric signal measured under the condition of a rectangular heat flux modulation and leads to the determination of the thickness distribution of the pyroelectric coefficient.…”

Influence of Thermocycling on the Polarization Distribution of Doped SBN Crystals

“…Prior to measurements, the illuminated surface was coated with sputtered silver-black to increase IR absorption. Temperature of the samples was changed continuously with a constant rate and was controlled by a copper-constantan thermocouple with an accuracy of 0.1 K. The polarization depth profile was controlled by measuring the depth dependence of the pyroelectric coefficient by TSW-method [3][4][5]. The switching processes were studied using the thermal Barkhausen effect method (TBE) [6].…”

Polarization Distribution and Domain Structure in SBN Crystal Doped by Eu or Rh

“…In the present work, we use a single frequency thermal square wave method (TSWM) for determination of the thickness distribution of pyrocoefficient, which is based on the pyroresponse analysis under rectangular heat flux modulation [8][9][10]. In the TSW method, the coordinate dependence of the effective pyroelectric coefficient is determined from the time dependence of the pyroelectric response.…”