Bridgman technique

Bridgman technique

[′brij·mən tek′nēk]
(solid-state physics)
A method of growing single crystals in which a vertical cylinder that tapers conically to a point at the bottom and contains the substance to be crystallized in molten form is slowly lowered into a cold zone, resulting in crystallization beginning at the tip.
References in periodicals archive ?
Yin, "Compositional homogeneity and electrical properties of lead magnesium niobate titanate single crystals grown by a modified bridgman technique," Japanese Journal of Applied Physics, vol.
Li, "Growth and electrical properties of large size Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 crystals prepared by the vertical Bridgman technique," Applied Physics Letters, vol.
For purification, the crystal was grown by the Bridgman technique three times.
TlBr crystals were grown by the vertical Bridgman technique, using quartz tubes as crucibles in vacuum atmosphere.
Due to the experimental particularities of the Bridgman purification used in this work, the following requirements mentioned previously are not established: (1st) in the crystal growth by the Bridgman technique, the raw material needs to be fully melted previously, which is in divergence with the hypothesis number (v); (2nd) in order to promote the nucleation, the growth crucible should be, preferably, cone-shaped, disregarding the hypothesis number (ii); (3th) due to the methodology applied, at each full melting, a fraction of the impurities, located in the top region, can recirculate by the Brownian movement, thereby reducing the efficiency of purification.
The TlBr resistivity above ~3 MQ was almost unaffected by the number of repetitions when growing crystals by Bridgman technique.
The near-MPB composition 0.29PIN-0.44PMN-0.27PT single crystals were grown using the vertical Bridgman technique [5].
Fan, "Growth of the relaxor based ferroelectric single crystals Pb([In.sub.1/2][Nb.sub.1/2])[O.sub.3]Pb([Mg.sub.1/3][Nb.sub.2/3])[O.sub.3]-PbTi[O.sub.3] by vertical Bridgman technique," Ferroelectrics, vol.