Characterization of temperature-dependent superlattice in Cu:KTN crystal

Abstract

In this study, we grew CuO doped potassium tantalum niobate (Cu:KTN) crystals with a uniform superlattice structure by the off-center top-seeded solution growth (TSSG) method. The process of crystal superlattice structure formation was observed under a polarizing microscope at variable temperatures. It was found that the formation of the superlattice structure in the crystal was closely related to the formation process of the domain structure in the crystal. The 90° domain structure in the crystal promoted the formation of the superlattice structure in the crystal. The purpose of the formation of the superlattice structure is to enable the crystal to reach a more stable state. The clear diffraction effect of the crystal superlattice structure is similar to the x-ray diffraction phenomenon of low-temperature crystals, and it exists in the crystal in a three-dimensional structure.

Corrosion and Biofouling Behaviors of Self‐Organized Structures on Steel Surface Fabricated by Femtosecond Laser

“…The structures block the electron transfer between the matrix and the electrolyte, and accordingly inhibit the cathodic and anodic reactions in electrochemical corrosion. [46] Compared with the hydrophilic ripple structure, the hydrophobic pillar structure exhibited a higher corrosion potential of À542.1 mV and a similar corrosion current density of 1.51 Â 10 À5 A cm À2 . The cathodic "gas film" of the pillar structure can effectively reduce the contact area and electron transfer between the matrix and the electrolyte.…”