Specific heat and electrocaloric properties of a SrTiO3 ceramic at low temperatures

Improved electrocaloric effect in (100)-oriented Pb0.97La0.02(Zr0.57Sn0.38Ti0.05)O3 antiferroelectric thick film by interface engineering

“…The first study on ECE was reported in 1930 in Rochelle salt by Kobeko and Kurtschatov [4]. Then lots of interests were focused on the ECE in bulk ceramics and liquids in the 1960s and 1970s, but no commercial value was exploited due to the small ECE and low operating temperature [5][6]. Until 2006, the turn was come after the reporting giant ECE of 12 K at 25 V in 350-nm-thick PbZr 0.95 Ti 0.05 O 3 film [7].…”

The electrocaloric effect (ECE) in ferroelectric polymer films

“…For SrTiO 3 , ΔT =1 °C and ΔS=34.63 J/m 3 K (6.75 × 10 -3 J/(kgK)) under 5.42 kV/cm electric field at 4 K from Eq. (7) (Lawless and Morrow, 1977). For Pb(Sc 0.5 Ta 0.5 )O 3 , a ΔT =1.5 °C and ΔS of 1.55 × 10 4 J/m 3 K (1.76 J/(kgK)) were measured directly for a sample under 25 kV/cm field at 25 °C (Sinyavsky and Brodyansky, 1992 (Tuttle and Payne, 1981).…”

Magnetization and specific heat ofLaTiO3

“…For that purpose we used SrTiO 3 as a reference material, as it posseses neither magnetic nor orbital degrees of freedom. Nevertheless, it has to be noted that, in most perovskites, an excess contribution from low-lying optical phonons has to be considered, even for temperatures below 50 K. 21 These soft-mode effects are strongest in SrTiO 3 because of its incipient ferroelectricity, and explain the small nonlinearities in worst overdo a little͒. For temperatures below 12 K, Woodfield et al 22 examined the specific heat of LaMnO 3 .…”