Autor: Grzegory, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Observation of Magnetic Anisotropy in GaN:Cr Single Crystals
Autorzy:: Gosk, J.
Boćkowski, M.
Kowalski, G.
Grzegory, I.
Szczytko, J.
Twardowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/1403624.pdf
Data publikacji:: 2012-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.55.Eq
75.30.Gw
75.50.Pp
75.10.Dg
Opis:: Magnetic properties of bulk wurtzite GaN:Cr single crystals were studied with the magnetic field applied parallel and perpendicular to the crystal wurtzite c-axis. Structure of the crystal was examined by the X-ray diffraction method. Strong anisotropy of magnetization at low temperatures (2-10 K) was observed. The experimental data suggest Cr to be in nonspherical $d^4$ configuration.
Źródło:: Acta Physica Polonica A; 2012, 122, 6; 1007-1009
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Time-Resolved Studies of Gallium Nitride Doped with Gadolinium
Autorzy:: Witek, B.
Wysmołek, A.
Kamińska, M.
Twardowski, A.
Potemski, M.
Boćkowski, M.
Grzegory, I.
Powiązania:: https://bibliotekanauki.pl/articles/1812021.pdf
Data publikacji:: 2008-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.55.Cr
75.50.Pp
71.55.-i
71.35.Ji
Opis:: Time-resolved photoluminescence experiments on high quality bulk GaN doped with Gd are presented. It was found that the decay time of Gd-related transitions observed for 4.2 K around 1.78 eV is of about 3 ms. Such a long decay time strongly supports the identification of this emission band as due to transitions between Gd³+(4f⁷) levels. The decay time measured for Gd-related transitions observed in the UV spectral range, close to the GaN band-gap, was found to be much faster than 1 μs. This suggests that these emission lines could hardly be correlated with internal transitions within Gd³+(4f⁷). Possible origin of the Gd-related UV luminescence is discussed.
Źródło:: Acta Physica Polonica A; 2008, 114, 5; 1425-1430
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Observation of Magnetic Anisotropy in Bulk GaMnN:Mg Crystals
Autorzy:: Gosk, J.
Zając, M.
Kamińska, M.
Twardowski, A.
Grzegory, I.
Boćkowski, M.
Porowski, S.
Powiązania:: https://bibliotekanauki.pl/articles/2036861.pdf
Data publikacji:: 2003-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.55.Eq
75.30.Gw
75.50.Pp
Opis:: Magnetic properties of bulk wurtzite n-type GaMnN and highly resistive GaMnN:Mg monocrystals were studied for the magnetic field applied parallel and perpendicular to the crystal hexagonal c-axis. Magnetization of both types of samples reveals paramagnetic behavior. However, for n-type GaMnN isotropic magnetization was observed which is in agreement with Mn d$\text{}^{5}$ configuration. On the other hand, GaMnN co-doped with Mg shows large magnetic anisotropy which suggests Mn to be in nonspherical d$\text{}^{4}$ or d$\text{}^{3}$ configuration.
Źródło:: Acta Physica Polonica A; 2003, 103, 6; 665-669
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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