Electrically tunable superconducting quasilumped element resonator using thin-film ferroelectrics

Structural and multiferroic properties of Fe-doped Ba0.5Sr0.5TiO3 solids

“…BST has been mainly used for dielectric devices such as capacitors for dynamic random access memory because of its high dielectric constant and low dissipation factor [21][22][23][24][25]. BST thin films have also been widely investigated for microwave applications such as phase shifters, tunable filters, tunable resonators, and switches [26][27][28][29][30]. Metal ion-doped BST samples, including thin films and ceramics, have also been investigated [31][32][33][34][35][36][37][38].…”

Determination of A.C. Conductivity of Nano-Composite Perovskite Ba<sub>(1- x - y)</sub>Sr<sub>(x)</sub>TiFe<sub>(y)</sub>O<sub>3</sub> Prepared by the Sol-Gel Technique

“…Consequently, the dielectric properties of the B10ST(10 and 20)F are decreased. Another interpretation for such decrease related to the fact that iron oxide has different lattice constant which add a stress in to the lattice [23][24][25].…”

Ultrathin Ferroelectric Films: Growth, Characterization, Physics and Applications

“…Large investigations have been carried out on quality improvement of BST thin films, among which Mg-based doping [547,548] or Mn-doping [549] has been demonstrated as an effective way. Alternatively, many competitive materials in thin film form have also been reported, such as STO (which is used for devices operating at low temperatures (~77 K)) [550,551,552], Pb x Sr 1−x TiO 3 [553], Bi 1.5 Zn 1.0 Nb 1.5 O 7 (BZN) [554,555], (Pb,Ba)ZrO 3 [556], and some BST-related ones like (Ba,Sr)(Zr,Ti)O 3 (BSZT) [557], etc. Differently, some tunable devices with ferroelectrics in the ferroelectric phase have been demonstrated, such as Na 0.5 K 0.5 NbO 3 thin films [558].…”