Results 21 to 30 of about 88,198 (304)

Determination of dislocation densities in InN

physica status solidi c, 2012
AbstractThe magneto‐transport measurements, carried out at magnetic fields up to 11 T and in the temperature range between 1.8 K and 300 K, are used to investigate the scattering mechanisms in GaN/InN/AlN double heterojunctions. Theoretical modeling is based on a variational approach to solving Boltzmann transport equation. It is found that dislocation
Ardali, Sukru, Tiras, Engin, Gunes, Mustafa, Balkan, Naci, Ajagunna, Adebowale Olufunso, Iliopoulos, Eleftherios, Georgakilas, Alexandros   +6 more
openaire   +3 more sources

Investigation of the indentation size effect based on measurement of the geometrically necessary dislocation density by electron backscatter diffraction

Mechanical Engineering Journal, 2018
In this study, we investigated the mechanism of the indentation size effect based on measurement of the geometrically necessary (GN) dislocation density. The GN dislocation density was measured around impressions by electron backscatter diffraction (EBSD)
Shota HASUNUMA, Hirohisa MIYAZAKI, Kensuke SHIMADA, Takeshi OGAWA   +3 more
doaj   +1 more source

Simulation-aided analysis of ferrite recrystallization behavior of pure iron with different dislocation characters

Journal of Materials Research and Technology, 2023
We investigated the ferrite recrystallization behavior of pure iron with different dislocation characters. Two types of specimens with almost the same dislocation densities and different dislocation characters were prepared.
Kotaro Iguchi, Toshio Ogawa, Fei Sun, Yoshitaka Adachi   +3 more
doaj   +1 more source

Multiferroicity Induced by Dislocated Spin-Density Waves [PDF]

Physical Review Letters, 2007
We uncover a new pathway towards multiferroicity, showing how magnetism can drive ferroelectricity without relying on inversion symmetry breaking of the magnetic ordering. Our free-energy analysis demonstrates that any commensurate spin-density-wave ordering with a phase dislocation, even if it is collinear, gives rise to an electric polarization.
Betouras, J.J., Giovannetti, G., Brink, J. van den   +2 more
openaire   +4 more sources

Electronic Structure Calculations at Macroscopic Scales [PDF]

, 2007
Electronic structure calculations, especially those using density-functional theory have provided many insights into various materials properties in the recent decade.
Gavini, Vikram
core   +1 more source

Phase-field simulation of nano-α′ precipitates under irradiation and dislocations

Journal of Materials Research and Technology, 2023
This is the first investigation on the micromorphology and kinetics evolution of Cr-rich α′ precipitates under Cr composition, irradiation and dislocation with the three-dimensional phase-field simulation.
Wenkui Yang, Xinan Jiang, Xiaolin Tian, Hua Hou, Yuhong Zhao   +4 more
doaj   +1 more source

Microstructure versus size: nano/microscale deformation of solute-strengthening Al alloys via pillar compression tests

Materials Research Letters, 2019
Effect of solutes, crystal orientation, sample’s size, and dislocation density on the nano/microscale deformation of solute-strengthening Al alloys has been investigated via pillar compression tests.
Shaohua Yan, Haiyang Zhou, Qing H. Qin
doaj   +1 more source

Relationship between Dislocation Density and Oxygen Concentration in Silicon Crystals during Directional Solidification

Crystals, 2018
This paper reports the relationship between oxygen concentration and dislocation multiplication in silicon crystals during directional solidification using numerical analysis. Based on the Alexander–Haasen–Sumino model, this analysis involved
Tomoro Ide, Hirofumi Harada, Yoshiji Miyamura, Masato Imai, Satoshi Nakano, Koichi Kakimoto   +5 more
doaj   +1 more source

Characterization of defect structures in nanocrystalline materials by X-ray line profile analysis [PDF]

, 2007
X-ray line profile analysis is a powerful alternative tool for determining dislocation densities, dislocation type, crystallite and subgrain size and size-distributions, and planar defects, especially the frequency of twin boundaries and stacking faults.
Tamás Ungár, Gubicza, Jenő, Jenõ Gubicza, Ungár, Tamás   +3 more
core   +1 more source

In-situ TEM study of loop evolution in FeCrAl alloy under Fe+ irradiation: Effects of temperatures, dislocations and precipitates

Nuclear Analysis, 2022
Fe13.5Cr4.7Al alloy was irradiated in-situ with 400 keV Fe+ in TEM at RT and 748 K. The evolution of dislocation loops under the influence of temperatures, irradiation dose, dislocation lines and precipitates were characterized in detail.
Kefei Pei, Guang Ran, Yipeng Li, Ziqi Cao, Dewang Cui, Ruiqian Zhang, Gang Yang   +6 more
doaj   +1 more source