Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "75.50.Pp" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-13 z 13
    Tytuł:
    A Monte Carlo Study of Critical Properties of Strongly Diluted Magnetic Semiconductor (Ga,Mn)As
    Autorzy:
    Tomczak, P.
    Diep, H.
    Jabłoński, P.
    Puszkarski, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030426.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Pp
    75.10.Nr
    75.30.Hx
    Opis:
    Within a Monte Carlo technique we examine critical properties of diluted bulk magnetic semiconductor (Ga,Mn)As modeled by a strongly diluted ferromagnetic Heisenberg spin-5/2 system on a face centered cubic lattice. We assumed that 5% of Ga atoms is substituted by Mn atoms and the interaction between them is of the RKKY-type. The considered system is randomly quenched and a double average was performed: firstly, over the Boltzmann probability distribution and secondly - over 2048 configurations related to the quenched disorder. We estimated the critical temperature: T_{c}=97±6 K, which is in agreement with the experiment.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 514-516
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ferromagnetism in II-VI Based Semiconductor Structures
    Autorzy:
    Cibert, J.
    Ferrand, D.
    Tatarenko, S.
    Wasiela, A.
    Kossacki, P.
    Dietl, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2027470.pdf
    Data publikacji:
    2001-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.80.Ey
    75.50.Pp
    75.30.Hx
    75.50.Dd
    Opis:
    The experimental results on carrier-induced ferromagnetic interaction in II-VI diluted magnetic semiconductors are shortly reviewed and analyzed in the light of the mean field approximation. We particularly take the point of view of the experimentalist to emphasize (i) points which are easily understood within this simple model (as the role of the detailed structure of the valence band) and hence should be incorporated into more sophisticated models, and (ii) points which are not taken into account in the mean field model (e.g., disorder effects) and hence call for more elaborate descriptions. We particularly discuss the case of a low carrier density, and show that the situation appears as experimentally very different in the highly disordered 3D layers and in the modulation doped 2D quantum wells.
    Źródło:
    Acta Physica Polonica A; 2001, 100, 2; 227-236
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Control of Ferromagnetism in Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te Based Quantum Wells
    Autorzy:
    Bertolini, M.
    Boukari, H.
    Ferrand, D.
    Cibert, J.
    Tatarenko, S.
    Gilles, B.
    Maślana, W.
    Gaj, J. A.
    Kossacki, P.
    Dietl, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2035587.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Hx
    75.50.Dd
    75.50.Pp
    78.55.Et
    Opis:
    New structures aiming at controlling the ferromagnetic properties of diluted magnetic semiconductor quantum wells are presented. The carrier density is controlled by applying a voltage across a p-i-n diode. A new method, creating a 2D hole gas by adjusting the distance between the quantum well and surface, offers opportunities for a broader range of structures.
    Źródło:
    Acta Physica Polonica A; 2002, 102, 4-5; 603-608
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ground-State Phase Diagram of a Model FCC Magnet with Modified RKKY Interaction
    Autorzy:
    Szałowski, K.
    Balcerzak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813773.pdf
    Data publikacji:
    2008-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Pp
    75.10.-b
    75.30.Hx
    75.30.Kz
    Opis:
    The ground-state phase diagram is studied for a diluted model magnet with FCC structure and modified Ruderman-Kittel-Kasuya-Yosida interaction. The modification consists in taking into account the exponential damping for the long-range interaction as well as the nearest-neighbors antiferromagnetic superexchange couplings. The existence of paramagnetic, ordered ferromagnetic and three distinct antiferromagnetic phases is shown. The stability areas of the phases upon the free-carriers concentration are investigated.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 1; 421-424
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Why Ferromagnetic Semiconductors?
    Autorzy:
    Dietl, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2030392.pdf
    Data publikacji:
    2001-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Pp
    72.25.Dc
    75.30.Hx
    85.75.-d
    Opis:
    Rapid development of information technologies originates from the exponential increase in the density of information that can be processed, stored, and transferred by the unit area of relevant devices. There is, however, a growing amount of evidences that the progress achieved in this way approaches its limits. Various novel ideas put forward to circumvent barriers ahead are described. Particular attention is paid to those concepts which propose to exploit electron or nuclear spins as the information carriers. Here, ferromagnetic semiconductors of III-V or II-VI compounds containing a sizable concentration of transition metals appear as outstanding spintronic materials.
    Źródło:
    Acta Physica Polonica A; 2001, 100, Supplement; 139-151
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of $Sn_{1-x}Cr_xTe$ Diluted Magnetic Semiconductors
    Autorzy:
    Kilanski, L.
    Podgórni, A.
    Górska, M.
    Dobrowolski, W.
    Slynko, V.
    Slynko, E.
    Reszka, A.
    Kowalski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399145.pdf
    Data publikacji:
    2013-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.80.Ga
    75.30.Hx
    75.30.Et
    75.50.Pp
    Opis:
    We present the studies of $Sn_{1-x}Cr_xTe$ semimagnetic semiconductors with chemical composition x ranging from 0.004 to 0.012. The structural characterization indicates that even at low average Cr-content x ≤q 0.012, the aggregation into micrometer size clusters appears in our samples. The magnetic properties are affected by the presence of clusters. In all our samples we observe the transition into the ordered state at temperatures between 130 and 140 K. The analysis of both static and dynamic magnetic susceptibility data indicates that the spin-glass-like state is observed in our samples. The addition of Cr to the alloy seems to shift the spin-glass-like transition from 130 K for x = 0.004 to 140 K for x = 0.012.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 5; 881-884
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Order and Magnetic Inhomogeneities in SnCrTe-PbCrTe Solid Solutions
    Autorzy:
    Kilanski, L.
    Szymański, M.
    Brodowska, B.
    Górska, M.
    Szymczak, R.
    Podgórni, A.
    Avdonin, A.
    Reszka, A.
    Kowalski, B.
    Domukhovski, V.
    Arciszewska, M.
    Dobrowolski, W.
    Slynko, V.
    Slynko, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1376790.pdf
    Data publikacji:
    2014-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.80.Ga
    75.30.Hx
    75.30.Et
    75.50.Pp
    Opis:
    We present the studies of structural, electrical and magnetic properties of bulk $Sn_{1-x-y}Pb_xCr_yTe$ mixed crystals with chemical composition 0.18 ≤ x ≤ 0.35 and 0.007 ≤ y ≤ 0.071. The magnetometric studies indicate that for the high Cr-content, y=0.071, the alloy shows ferromagnetic alignment with the Curie temperature, $T_{C}$, around 265 K. The $Cr_5Te_8$ clusters are responsible for the ferromagnetic order. At low Cr content, y ≈ 0.01, a peak in the ac magnetic susceptibility identified as the cluster-glass-like transition is observed at a temperature about 130 K. The cluster-glass-like transition is likely due to the presence of $Cr_2Te_3$ clusters in the samples with y ≈ 0.01. The transport characterization of the samples indicated strong metallic p-type conductivity with relatively high carrier concentration, n > $10^{20}$ $cm^{-3}$, and carrier mobility, μ > 150 $cm^2$/(V s).
    Źródło:
    Acta Physica Polonica A; 2014, 126, 5; 1203-1206
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    MBE Growth and Magnetooptical Properties of (Zn,Co)Te Layers
    Autorzy:
    Papaj, M.
    Kobak, J.
    Rousset, J.
    Janik, E.
    Golnik, A.
    Kossacki, P.
    Pacuski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1403629.pdf
    Data publikacji:
    2012-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Pp
    75.30.Hx
    78.20.Ls
    71.35.Ji
    Opis:
    We report on epitaxial growth of diluted magnetic semiconductor (Zn,Co)Te. Reflectivity spectra reveal excitonic transition which split under magnetic field due to giant Zeeman effect. Magnetooptical effects can be described using literature data.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 6; 1010-1011
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetooptical Properties of (Ga,Fe)N Layers
    Autorzy:
    Papierska, J.
    Rousset, J.
    Pacuski, W.
    Kossacki, P.
    Golnik, A.
    Nawrocki, M.
    Gaj, J.
    Suffczyński, J.
    Kowalik, I.
    Stefanowicz, W.
    Sawicki, M.
    Dietl, T.
    Navarro-Quezada, A.
    Faina, B.
    Li, T.
    Bonanni, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1492954.pdf
    Data publikacji:
    2011-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Pp
    75.30.Hx
    78.20.Ls
    71.35.Ji
    Opis:
    Magnetooptical properties of (Ga,Fe)N layers containing various concentrations of Fe-rich nanocrystals embedded in paramagnetic (Ga,Fe)N layers are reported. Previous studies of such samples demonstrated that magnetization consists of a paramagnetic contribution due to substitutional diluted Fe ions as well as of ferromagnetic and antiferromagnetic components originating from Fe-rich nanocrystals, whose relative abundance can be controlled by the growth conditions. The nanocrystals are found to broaden and to reduce the magnitude of the excitonic features. However, the ferromagnetic contribution, clearly seen in SQUID magnetometry, is not revealed by magnetic circular dichroism. Possible reasons for differences in magnetic response determined by magnetic circular dichroism and SQUID measurements are discussed.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 5; 921-923
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Excitonic Giant Zeeman Effect in Wide Gap Diluted Magnetic Semiconductors Based on ZnO and GaN
    Autorzy:
    Pacuski, W.
    Ferrand, D.
    Kossacki, P.
    Marcet, S.
    Cibert, J.
    Gaj, J. A.
    Golnik, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2046983.pdf
    Data publikacji:
    2006-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Pp
    75.30.Hx
    78.20.Ls
    71.35.Ji
    Opis:
    We present a theoretical description of the excitonic giant Zeeman effect observed in wide gap diluted magnetic semiconductors (Zn,Co)O and (Ga,Mn)N. In these materials, A and B excitons present quite complex energy shifts and change of oscillator strengths under magnetic field. These features can be well reproduced using an excitonic Hamiltonian, taking into account ion-carrier exchange, wurtzite trigonal crystal field, spin-orbit and electron-hole exchange interactions.
    Źródło:
    Acta Physica Polonica A; 2006, 110, 3; 303-309
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photoluminescence of p-Doped Quantum Wells with Strong Spin Splitting
    Autorzy:
    Boukari, H.
    Kossacki, P.
    Bertolini, M.
    Ferrand, D.
    Cibert, J.
    Tatarenko, S.
    Gaj, J. A.
    Deveaud, B.
    Ciulin, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2038307.pdf
    Data publikacji:
    2004-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.35.-y
    71.55.Gs
    73.21.Fg
    75.30.Hx
    75.50.Pp
    Opis:
    Photoluminescence of p-type modulation doped (Cd,Mn)Te quantum wells is studied with carrier density up to 5×10$\text{}^{11}$ cm$\text{}^{-2}$ at various spin splittings. This splitting can be made larger than the characteristic energies of the system thanks to the giant Zeeman effect. At small spin splitting and regardless of the carrier density, the photoluminescence exhibits a single line, which corresponds to the charged exciton in the singlet state. Above a certain spin splitting, the charged exciton is destabilized in favor of the exciton at vanishing hole density, and in favor of a double line at higher carrier density. It is found here that the charged exciton destabilization energy hardly depends on the carrier density. The double line is found to be band-to-band like, with the same initial state - where the holes have the same spin orientation - and final states that differ by some excitation of the 2D hole gas. In addition, the spin splitting needed to fully polarize the hole gas is twice smaller than expected from the single particle image and gives a unique insight into many-body effects in the hole gas.
    Źródło:
    Acta Physica Polonica A; 2004, 106, 3; 299-310
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    MBE Growth of CdTe/ZnTe Quantum Dots with Single Mn Ions
    Autorzy:
    Gietka, K.
    Kobak, J.
    Rousset, J.
    Janik, E.
    Słupiński, T.
    Kossacki, P.
    Golnik, A.
    Pacuski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1403652.pdf
    Data publikacji:
    2012-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.55.Et
    81.07.Ta
    78.67.Hc
    75.50.Pp
    75.75.Cd
    75.30.Hx
    Opis:
    We report MBE growth and properties of samples with self assembled quantum dots with single manganese ions and low density of quantum dots. Manganese concentration was calibrated using magneto-reflectivity measurements and the giant Zeeman effect in (Cd,Mn)Te and (Zn,Mn)Te layers. Successful incorporation of Mn in the CdTe/ZnTe quantum dots was confirmed using micro-photoluminescence measurements: single manganese ion in quantum dot manifests in sixfold splitting of exciton emission lines due to s, p-d exchange interaction.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 6; 1056-1058
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    DFT+U Calculations of Transition Metal Doped AlN
    Autorzy:
    Kaczkowski, J.
    Jezierski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1791351.pdf
    Data publikacji:
    2009-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.-b
    71.20.Nr
    71.55.-i
    71.55.Eq
    71.55.Ak
    75.30.Hx
    75.50.Pp
    Opis:
    The electronic structure of transition metal (TM = V, Cr, Mn, Fe) doped aluminium nitride was presented. The calculations were made within the DFT and DFT+U approach and the supercell approximation. The effective interaction parameter Hubbard U for mentioned compounds was determined within linear response approach in contrast to the other type of calculations which treated this factor as an adjustable parameter.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 5; 924-926
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies