Temat: 75.30.Ef - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Itinerant Theory of Exchange Constants in Diluted Co-Based Semimagnetic Semiconductors
Autorzy:: Mašek, J.
Powiązania:: https://bibliotekanauki.pl/articles/1888118.pdf
Data publikacji:: 1991-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.10.Lp
75.30.Ef
75.50.Pp
Opis:: The exchange constants in diluted semimagnetic semiconductors with Co are much larger than in the Mn doped systems. To explain this, we use a semiquantitative, tight binding version of the coherent potential approach and calculate the electronic structure of II-VI mixed semiconductors containing Co and Mn. The exchange constants are deduced from energies of spin reversal processes. The presence of the Co 3d states at the top of the valence band leads to the observed enhancement of the exchange coupling.
Źródło:: Acta Physica Polonica A; 1991, 80, 2; 267-270
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Pressure Influence on the Curie Temperature
Autorzy:: Rutkowski, J.
Wojtczak, L.
Zajac, Š.
Powiązania:: https://bibliotekanauki.pl/articles/1506985.pdf
Data publikacji:: 2010-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.30.Kz
75.40.-s
75.50.Cc
81.40.Vw
64.30.Ef
Opis:: The pressure dependence of the ferromagnetic-paramagnetic phase transition temperature $T_{C}$ (p) is of high interest due to its direct technological implications. The theoretical investigations of the Curie temperature $T_{C}$ (p) considered in the ferromagnetic crystals have been studied employing various methods of calculations. The present paper is devoted to its description by means of the pseudoharmonic approximation approach.
Źródło:: Acta Physica Polonica A; 2010, 118, 5; 745-746
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: High Resolution Tips for Switching Magnetization MFM
Autorzy:: Precner, M.
Fedor, J.
Tóbik, J.
Šoltýs, J.
Cambel, V.
Powiązania:: https://bibliotekanauki.pl/articles/1372464.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.75.+a
75.70.-i
68.37.Rt
75.60.Jk
81.15.Ef
02.30.Nw
Opis:: Switching magnetization magnetic force microscopy (SM-MFM) is based on two-pass magnetic force microscopy with opposite orientation of tip magnetization between two scans. The sum of the scanned data with reversed tip magnetization depicts local van der Waals forces, and their difference maps the local magnetic forces. Tip magnetization can be easily reversed in external magnetic field during the scanning. The separation of the forces mapped enables scanning in close proximity of the sample (~5 nm). Therefore, extremely high spatial resolution (10 nm) is achievable by the SM-MFM. Image phase resolution of the MFM method depends on various geometric parameters of the tip, such as tip length, its apex radius and taper angle. The parameters are determined by the evaporation process, within which the standard atomic force microscopy tips are coated with magnetic layer. In this work we show that the thickness of the coated layer is important for the SM-MFM spatial resolution.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 386-387
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Brownian Movement of Inorganic Nanoparticles in Sediments
Autorzy:: Fornal, P.
Stanek, J.
Powiązania:: https://bibliotekanauki.pl/articles/1506300.pdf
Data publikacji:: 2011-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 05.40.Jc
64.75.Xc
47.57.ef
66.30.Pa
87.64.kx
Opis:: The 100 nm particles of $Fe_{2}O_{3}$ and metallic Fe sedimented jointly with $Al_{2}O_{3}$ powder from their suspension in oleic acid exhibit distinguished mobility which depends on the concentration of aluminum oxide. This observation is interpreted as the result of the interparticle Fe-Fe magnetic interactions which lead to the formation of the rigid network of magnetic metallic iron nanoparticles.
Źródło:: Acta Physica Polonica A; 2011, 119, 1; 12-14
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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