Autor: Majtyka, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Nanoscale deformation of GaAs affected by silicon doping
Autorzy:: Majtyka, A.
Nowak, R.
Chrobak, D.
Powiązania:: https://bibliotekanauki.pl/articles/1112264.pdf
Data publikacji:: 2016-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 64.70.kg
61.72.J-
Opis:: Effect of silicon doping on the elastic-plastic transition of GaAs crystal is demonstrated by results of nanoindentations and ab initio simulations. The performed experiments show that an increase of silicon concentration causes a decrease of the contact pressure at the onset of permanent nanodeformation of GaAs crystal. Ab initio calculations demonstrate that presence of Si atoms in the crystal lattice suppresses the shear modulus as well as the pressure of equilibrium between zinc-blende and rock-salt phases of GaAs. Furthermore, it is argued that the effect of dislocations pinning to Si dopants is essential for clarification of GaAs yielding.
Źródło:: Acta Physica Polonica A; 2016, 130, 4; 1127-1130
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Electronic Structure of $Sm(Ni_{1-x}Co_{x})_3$ Alloys - XPS and ab initio Study
Autorzy:: Majtyka, A.
Sikora, M.
Blachiński, D.
Chełkowska, G.
Deniszczyk, J.
Powiązania:: https://bibliotekanauki.pl/articles/1397014.pdf
Data publikacji:: 2018-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.20.Be
79.60.Bm
Opis:: The band structure investigations for $Sm(Ni_{1-x}Co_{x})_3$ alloys by means of X-ray photoelectron spectroscopy (XPS) and an ab initio density functional theory (DFT) calculations are presented. The aim was to determine an effect of Ni/Co substitution on the electronic structure of the alloys. Investigations have shown that the Ni/Co substitution results in a reconstruction of the valence band (VB), especially the intensity near the Fermi level decreases with Co content. An ab initio simulated XPS VB spectra agree qualitatively with experimental ones with the exception of the Sm-4f sub-spectra where the multiplet decomposition is observed. Calculations shown that variation of magnetization in $Sm(Ni_{1-x}Co_{x})_3$ is driven mainly by the Ni/Co-3d and Sm-5d states polarization and increases linearly with rising Co content.
Źródło:: Acta Physica Polonica A; 2018, 133, 3; 673-675
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Elastic-plastic transition in MBE-grown GaSb semiconducting crystal examined by nanoindentation
Autorzy:: Majtyka, A.
Trębala, M.
Tukiainen, A.
Chrobak, D.
Borgieł, W.
Räisänen, J.
Nowak, R.
Powiązania:: https://bibliotekanauki.pl/articles/1075863.pdf
Data publikacji:: 2016-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 81.40.Jj
62.20.F-
81.15.Hi
81.05.Ea
Opis:: The present paper concerns the elastic-plastic nanodeformation of Te-doped GaSb crystals grown by molecular beam epitaxy on the n-type of GaSb substrate. The conventional analysis of nanoindentation data obtained with sharp triangular (Berkovich) and spherical tip revealed the elastic modulus (E=83.07± 1.78 GPa), hardness (H=5.19±0.25 GPa) and "true hardness" (H_{T}=5.73±0.04 GPa). The registered pop-in event which indicates the elastic-plastic transition in GaSb crystal points towards the corresponding yield strength (σ_{Y}=3.8±0.1 GPa). The origin of incipient plasticity in GaSb crystal is discussed in terms of elastic-plastic deformation energy concept.
Źródło:: Acta Physica Polonica A; 2016, 130, 4; 1131-1133
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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