Physical properties of strontium barium niobate thin films prepared by polymeric chemical method

Abstract

Randomly oriented Sr 0.75 Ba 0.25 Nb 2 O 6 thin films have been deposited on Pt(111)/Ti/SiO 2 /Si substrates using a polymeric chemical method to study their physical properties. Refinements of the structure confirm the stoichiometry of the studied films. The relaxor behavior is evidenced by the dielectric measurements and V€ ogel-Fulcher analysis of the dielectric curves. Lowering the transition temperature (T m ) by about 100 K and asymmetries in the local hysteresis loops well above T m are discussed in terms of the existence of complex defects in thin films. KEYWORDS Relaxor; hysteresis loop; dielectric measurement; SBN CONTACT E.B. Araujo eudes@dfq.feis.unesp.br Color versions of one or more of the figures in the article can be found online at www.tandfonline.com/gfer.

Crystallization and Texturing of SrxBa1–xNb2O6 Thin Films Prepared by Aqueous Solution Deposition─An In Situ X-ray Diffraction Study

“…The aqueous CSD method is a low-cost, flexible, and environmentally friendly deposition method. 43,44 The structure of SBN thin films typically ranges from polycrystalline 40 to oriented and epitaxial, 21,23,35,36 where the type of substrate is an important parameter. Epitaxial or highly oriented growth has been reported on MgO, 26,28,30,31,36,45,46 SrTiO 3 (STO), 21,23,24,35,36 Si(100), 37,39 and LaNiO 3 /CeO 2 / YSZ/Si(100).…”

“…Thin films offer advantages including texturing of the materials, improvement of properties, and potential minimization of devices . For example, strain engineering with a proper choice of substrate and synthesis method can tune the properties of ferroelectric thin films. − SBN thin films have been deposited by different synthesis methods, including PLD, − RF sputtering, − sol–gel synthesis, − polymeric chemical method, , and chemical solution deposition (CSD) . The physical deposition techniques are time-consuming, hard to upscale, or expensive, while wet chemical synthesis often uses toxic organic solvents.…”

“…The structure of SBN thin films typically ranges from polycrystalline to oriented and epitaxial, ,,, where the type of substrate is an important parameter. Epitaxial or highly oriented growth has been reported on MgO, ,,,,,, SrTiO 3 (STO), ,,,, Si(100), , and LaNiO 3 /CeO 2 /YSZ/Si­(100) .…”

Synthesis, structural characterization and functional properties of Sr0.5Ba0.5Nb2−xFexO6 ceramic powders

“…Therefore, the doping of SBN compound with iron results in the multiferroic property. Several methods have been proposed for the synthesis and processing of SBN ferroelectric ceramics, including solidstate synthesis, gel citrate, Pechini and controlled precipitation [4][5][6][7][8][9][10] . The controlled precipitation method is based on aqueous media reactions containing stoichiometric predetermined amounts of the precursors (salts).…”

Local environments and transport properties of heavily doped strontium barium niobates Sr0.5Ba0.5Nb2O6

“…The structural aspects and their relation with the functional properties have been comprehensively discussed by Zhu et al [18] using a crystal-chemical model for the whole family of tetragonal bronzes. Fine details [33][34][35][36][37][38][39][40][41] of the basic tetragonal tungsten bronze crystal structure [1,2] are affected by Sr/Ba composition, thermal annealing, interaction with external oxygen [42], and the synthetic pathways [8,[11][12][13]15,[20][21][22][23][34][35][36]38,39,[43][44][45][46][47][48][49][50][51].…”