Terence E. Mitchell

TL;DR: In this article, it was shown conclusively that the internal field originates from nonstoichiometric point defects in LiNbO3 crystals, and that the switching fields required for 180° domain reversal in congruent crystals [C=Li2O/(Li 2O+Nb2O5)=0484] are ∼4-5 times larger than the switching field for nearstoichometric crystals (C=0498).

TL;DR: In this paper, the authors used a double crucible Czochralski method to grow LiTaO3 single crystals with a composition close to stoichiometry by using a double-crazed double-branched crystal Czarnecki method and compared the switching field required for 180° ferroelectric domain reversal and the internal fields originating from nonstoichiometric point defects for the stoichiometric and conventional commercially available crystals.

TL;DR: In this article, the slip behavior in coherent and semicoherent metallic bilayer composites is examined by atomic simulation in the Cu/Ni and Cu/Ag systems and it is shown that the application of stresses needed for glide dislocations to cross the interface or to escape from the interface exacerbates the nonlinearities in the elastic response of the system.

TL;DR: In this article, the deformation of sapphire was studied under hydrostatic confining pressure at temperatures below the ambient pressure brittle-to-ductile transition temperature, and the temperature dependence of critical resolved shear stress (τcrss) was significantly greater than that for prism plane slip (Bbasal > Bprism plane), causing the latter system to be the easy slip system below ∼600°C.

TL;DR: In this paper, the room temperature and low temperature elastic properties of hexagonal C40 transition metal disilicides, NbSi2 and TaSi2, have been studied using Resonant Ultrasound Spectroscopy (RUS).