Determination of grain‐boundary defect‐state densities from transport measurements

1991 ◽  
Vol 69 (6) ◽  
pp. 3605-3611 ◽  
Author(s):  
P. V. Evans ◽  
S. F. Nelson
Keyword(s):  
Grain Boundary ◽  
Defect State ◽  
Boundary Defect ◽  
Transport Measurements ◽  
State Densities

Estimation of Defect State Densities from Bulk Photoelectronic Properties of a-Si,Ge:H Alloys

1987 ◽  
Vol 95 ◽  
Author(s):  
G. N. Parsons ◽  
G. Lucovsky
Keyword(s):  
Activation Energy ◽  
Incident Light ◽  
Film Surface ◽  
Dark Conductivity ◽  
State Density ◽  
Defect State ◽  
Oxide Interface ◽  
Conductivity Activation Energy ◽  
State Densities

AbstractWe have studied the photoelectronic properities of a- Si(x),Ge(1−x):H alloy films and have concluded that there are depletion layers at the film surface and film/oxide interface that effect the determination of bulk quantum effieciencymobility- lifetime (nuT) products. From changes in dark conductivity activation energy with film thickness and the nuT product with wavelength of incident light we have estimated defeci sta:e lensitles. Our best x=0.5 film has an nuT value of 9×10−8 cm2 V−1 andaj defect state density near the Fermi level of approximately 5×10 cm−3 eV−1.

Determination of grain-boundary diffusion of Ag in nanocrystalline Cu by the Hwang–Balluffi method

2001 ◽  
Vol 89 (7) ◽  
pp. 3971-3975 ◽  
Author(s):  
Z. Erdélyi ◽  
Ch. Girardeaux ◽  
G. A. Langer ◽  
D. L. Beke ◽  
A. Rolland ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Boundary Diffusion ◽  
Grain Boundary Diffusion

Grain boundary analysis in TEM. I. Practical determination of bicrystal orientations

1978 ◽  
Vol 50 (2) ◽  
pp. 703-709 ◽  
Author(s):  
Th. Karakostas ◽  
G. Nouet ◽  
G. L. Bleris ◽  
S. Hagege ◽  
P. Delavignette
Keyword(s):  
Grain Boundary ◽  
Boundary Analysis

scholarly journals Increasing contribution of grain boundary compliance to polycrystalline ice elasticity as temperature increases

2018 ◽  
Vol 64 (246) ◽  
pp. 669-674
Author(s):  
COLIN M. SAYERS
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Orientation Distribution ◽  
Resonant Ultrasound Spectroscopy ◽  
Wave Velocities ◽  
Polycrystalline Ice ◽  
Resonant Ultrasound ◽  
Increasing Temperature ◽  
Shear Compliance

ABSTRACTMeasured elastic stiffnesses of ice polycrystals decrease with increasing temperature due to a decrease in grain boundary stiffness with increasing temperature. In this paper, we represent grain boundaries as imperfectly bonded interfaces, across which traction is continuous, but displacement may be discontinuous. We express the additional compliance due to grain boundaries in terms of a second-rank and a fourth-rank tensor, which quantify the effect on elastic wave velocities of the orientation distribution as well as the normal and shear compliances of the grain boundaries. Measurement of the elastic stiffnesses allows determination of the components of these tensors. Application of the method to resonant ultrasound spectroscopy measurements made on ice polycrystals enables determination of the ratio BN/BS of the normal to shear compliance of the grain boundaries, which are found to be more compliant in shear than in compression. The ratio BN/BS is small at low temperatures, but increases as temperature increases, implying that the normal compliance increases relative to the shear compliance as temperature increases.

Grain boundary defect compensation in Ti-doped BaFe0.5Nb0.5O3 ceramics

2016 ◽  
Vol 122 (9) ◽  
Author(s):  
Xiaojun Sun ◽  
Jianming Deng ◽  
Saisai Liu ◽  
Tianxiang Yan ◽  
Biaolin Peng ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Boundary Defect
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