Autor: Buczko, R. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Small Antiferromagnetic Clusters
Autorzy:: Buczko, R.
Wilamowski, Z.
Jantsch, W.
Powiązania:: https://bibliotekanauki.pl/articles/1950740.pdf
Data publikacji:: 1996-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.10.Jm
75.50.Rr
Opis:: The analysis of the quantum mechanical model of mesoscopic size antiferromagnets shows that small antiferromagnets are characterized by a stronger exchange coupling and by an oscillating character of spins polarizations. Experimental evidence of the quantum character is discussed. We interpret the interlayer coupling in antiferromagnet superlattices and a puzzling resonance observed in nano-size antiferromagnet grains.
Źródło:: Acta Physica Polonica A; 1996, 90, 4; 747-750
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Quantum Phenomena in Small Antiferromagnets
Autorzy:: Wilamowski, Z.
Buczko, R.
Jantsch, W.
Powiązania:: https://bibliotekanauki.pl/articles/1964697.pdf
Data publikacji:: 1997-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.10.Jm
75.50.-y
Opis:: We show that the most characteristic properties of mesoscopic antiferromagnets can be explained in terms of the response on a spatially inhomogeneous perturbation. This concept allows to explain the dynamic properties (quantum resonance, coherence and tunnelling rates) as well as static perturbations which, for increasing size of an antiferromagnet, leads to a transition from the quantum mechanical oscillating system to a classical antiferromagnet with well defined Néel vectors.
Źródło:: Acta Physica Polonica A; 1997, 92, 2; 379-382
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Magnesium Acceptor Energy Levels in Cubic GaN
Autorzy:: Przybylińska, H.
Buczko, R.
Kocher, G.
Jantsch, W.
Powiązania:: https://bibliotekanauki.pl/articles/2036869.pdf
Data publikacji:: 2003-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.30.-j
71.55.-i
71.55.Eq
Opis:: Intra-impurity transitions of the Mg acceptor in cubic phase GaN were measured with the use of photothermal ionization spectroscopy. Apart from the photoionization band several sharp features were detected, related to internal Mg-acceptor transitions. The transitions were identified with the help of effective-mass model calculations involving light- and heavy-hole as well as spin--orbit split-off bands. Transitions to resonant states, associated with the spin-orbit split-off valence band, were also identified. The determined hole binding energy of the Mg acceptor in zinc-blende GaN is 236±1 meV.
Źródło:: Acta Physica Polonica A; 2003, 103, 6; 683-688
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Ultra-Fast Spin Dynamics in Diluted Magnetic Semiconductors
Autorzy:: Wilamowski, Z.
Buczko, R.
Karczewski, G.
Jantsch, W.
Powiązania:: https://bibliotekanauki.pl/articles/1952363.pdf
Data publikacji:: 1996-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.10.Jm
75.50.-y
Opis:: In nano-size antiferromagnetic systems a spatially inhomogeneous field leads to the formation of a staggered magnetization. Thereby the total magnetic moment does not change but the formation of a net magnetic moment at the border of the cluster leads to an energy gain. This type of magnetism is characterised by an ultra-fast dynamics. We suggest it is also responsible for the formation of the exciton magnetic polaron.
Źródło:: Acta Physica Polonica A; 1996, 90, 5; 969-972
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Magnetic Properties of Semiconductor-Antiferromagnet Superlattices
Autorzy:: Wilamowski, Z.
Buczko, R.
Jantsch, W.
Ludwig, M.
Springholz, G.
Powiązania:: https://bibliotekanauki.pl/articles/1952426.pdf
Data publikacji:: 1996-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Ee
75.50.Pp
76.50.+g
Opis:: Magnetic resonance investigations of ultra-thin antiferromagnetic EuTe layers show a specific behaviour in the quasi-2D antiferromagnetic ordering: (i) an anisotropy of the critical broadening, (ii) a substantial increase in the Néel temperature and (iii) an anisotropic shift of the resonance frequency which diverges at the Néel point. The results show that exchange coupling is stronger in quasi-2D than in 3D antiferromagnetic samples and that correlation of spin chains aligned in the perpendicular direction occurs already well above the Néel point.
Źródło:: Acta Physica Polonica A; 1996, 90, 5; 973-976
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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