140976.fig.0018a
(a)
140976.fig.0018b
(b)
Figure 18: (a) PLD BaxSr1−x TiO3 capacitor structures on microwave ceramic substrates (CoorsTek SUP 996 Hirel, 5 0 × 5 0 × 0 . 6 3 5  mm³, A-face: R a 2 1  nm) with DC sputtered 3 mm diameter gold (G1072) or platinum (G1017) electrodes ~150 nm thick. The nominal thickness of the dielectric film is 1 to 2 μm. (b) Self-made temperature controller platform with adjustable top contacts for the large-area 5 0 × 5 0 mm² capacitor structures. The water cooled Peltier element enables a temperature sweep from −35°C up to +85°C.