Dielectric properties of LiF single crystals X-ray irradiated under d.c. fields

1987 ◽  
Vol 22 (6) ◽  
pp. 2017-2022 ◽  
Author(s):  
N. Veeraiah
Keyword(s):  
Dielectric Properties ◽  
Single Crystals ◽  
X Ray

scholarly journals New superprotonic crystals with dynamically disordered hydrogen bonds: cation replacements as the alternative to temperature increase

2017 ◽  
Vol 73 (6) ◽  
pp. 1105-1113 ◽  
Author(s):  
Elena V. Selezneva ◽  
Irina P. Makarova ◽  
Inna A. Malyshkina ◽  
Nadezhda D. Gavrilova ◽  
Vadim V. Grebenev ◽  
...  
Keyword(s):  
High Temperature ◽  
Dielectric Properties ◽  
Hydrogen Bonds ◽  
Single Crystals ◽  
Diffraction Data ◽  
Room Temperature ◽  
Ambient Conditions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Superprotonic Phase

Investigations of new single crystals grown in the K3H(SO4)2–(NH4)3H(SO4)2–H2O system from solutions with different K:NH4 concentration ratios have been carried out. Based on the X-ray diffraction data, the atomic structure of the crystals was determined at room temperature taking H atoms into account. It has been determined that [K0.43(NH4)0.57]3H(SO4)2 crystals are trigonal at ambient conditions such as the superprotonic phase of (NH4)3H(SO4)2 at high temperature. A distribution of the K and N atoms in the crystal was modelled on the basis of the refined occupancies of K/N positions. Studies of dielectric properties over the temperature range 223–353 K revealed high values of conductivity of the crystals comparable with the conductivity of known superprotonic compounds at high temperatures, and an anomaly corresponding to a transition to the phase with low conductivity upon cooling.

Crystal structure, thermal expansion and dielectric properties of monoclinic ethylenediammonium bis(hydrogensuccinate), H3N(CH2)2NH3(HC4H4O4)2

1994 ◽  
Vol 209 (1) ◽  
Author(s):  
J. Schreuer ◽  
T. Münch
Keyword(s):  
Crystal Structure ◽  
Thermal Expansion ◽  
Dielectric Properties ◽  
Aqueous Solutions ◽  
Single Crystals ◽  
Structure Analysis ◽  
Optical Quality ◽  
Space Group ◽  
X Ray

AbstractLarge single crystals of optical quality of monoclinic ethylenediammonium bis(hydrogensuccinate) were grown from aqueous solutions. An X-ray structure analysis yielded space group

Effect of quenching and X-ray irradiation on the dielectric properties of PbI2 single crystals

1981 ◽  
Vol 64 (1) ◽  
pp. 413-417 ◽  
Author(s):  
D. P. Yadav ◽  
H. N. Acharya ◽  
K. V. Rao
Keyword(s):  
Dielectric Properties ◽  
Single Crystals ◽  
X Ray

Magnetic and Dielectric Properties of PbFeBO4 and PbMnBO4 Single Crystals

2014 ◽  
Vol 215 ◽  
pp. 372-377 ◽  
Author(s):  
A.I. Pankrats ◽  
K.A. Sablina ◽  
D.A. Velikanov ◽  
O.A. Bayukov ◽  
A.M. Vorotynov ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Curie Temperature ◽  
Single Crystal ◽  
Single Crystals ◽  
Neel Temperature ◽  
Strong Anisotropy ◽  
Néel Temperature ◽  
X Ray ◽  
Magnetic And Dielectric Properties ◽  
Magnetic Dielectric

PbFeBO4 and PbMnBO4 single crystals were synthesized. The X-ray, magnetic, dielectric, Mössbauer, and resonance investigations of the crystals were fulfilled. It is established that single-crystal PbFeBO4 is an antiferromagnet with a Néel temperature TN =114 K, while PbMnBO4 is a ferromagnet with a Curie temperature TC = 31 K. Both single-crystal compounds have a strong anisotropy of the magnetic and dielectric properties.

Enhancement of second harmonic generation, optical and dielectric properties inL-asparagine monohydrate single crystals due to an improvement in crystalline perfection by annealing

2010 ◽  
Vol 43 (3) ◽  
pp. 491-497 ◽  
Author(s):  
Mohd. Shakir ◽  
S. K. Kushawaha ◽  
K. K. Maurya ◽  
Sumeet Kumar ◽  
M. A. Wahab ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Second Harmonic Generation ◽  
Single Crystals ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
X Ray Diffraction ◽  
Crystalline Perfection ◽  
Second Harmonic Generation Efficiency ◽  
X Ray ◽  
Asparagine Monohydrate

Single crystals of the relatively new nonlinear optical material L-asparagine monohydrate have been successfully grown by the slow evaporation solution growth technique at room temperature in aqueous solution. The crystal system of the title material has been confirmed by powder X-ray diffraction. The crystalline perfection of the as-grown and annealed crystals has been evaluated by high-resolution X-ray diffraction. The as-grown single crystals (particularly when their size is large) were found to contain internal structural grain boundaries, and the crystalline perfection of these crystals was found to be improved substantially by annealing at low temperatures. The crystalline perfection and the measured physical properties were found to be correlated such that the second harmonic generation efficiency, optical transparency, fluorescence and dielectric properties are enhanced as the crystal quality improves.

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