Temat: 68.65.Ac - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: XRD and TEM heating of large period Ni/Al multilayer coatings
Autorzy:: Świątek, Z.
Gradys, A.
Maj, Ł.
Morgiel, J.
Marszałek, K.
Mania, R.
Szlezynger, M.
Tematy:: 68.65.Ac
68.37.Lp; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1113635.pdf Link otwiera się w nowym oknie
Opis:: The Ni/Al multilayer coating of λ ≈100 nm was deposited onto (001)-oriented monocrystalline silicon substrate using double target magnetron sputtering system equipped with rotating sample holder. The thicknesses of alternating layers were adjusted in the way to preserve the chemical composition ratio close to 50%Al:50%Ni (at.%). The in situ X-ray diffraction and in situ transmission electron microscopy heating experiments were carried out at relatively low heating rates (20°C/min) in order to study the phase transformation sequence. The investigations revealed that the reaction between Ni and Al multilayers starts at ≈200°C with precipitation of Al₃Ni phase, while above 300°C dominates precipitation of Ni₃Al and NiAl intermetallic phases. Both the X-ray and electron diffractions acquired at 450°C confirmed presence of the Ni₃Al and NiAl intermetallics, but the former pointed at still lasting traces of Ni(Al) solid solution.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Direct Laser Interference Patterning: Theory and Application
Autorzy:: Zabila, Y.
Perzanowski, M.
Dobrowolska, A.
Kąc, M.
Polit, A.
Marszałek, M.
Tematy:: 68.55.-a
68.65.Ac; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1810273.pdf Link otwiera się w nowym oknie
Opis:: We simulated and experimentally investigated the formation of periodic structures generated by multibeam interference patterning. The simulations at the different setup geometry show that resulting interference pattern is quasi-periodical. The calculated patterns show that the symmetries of the interference maxima depend mostly on the angles of incidence and that a wide variety of patterns can be obtained. Because of the difficulty in aligning four beams sufficiently well to avoid secondary periodicities, for testing we used a three-beam interference configuration. Atomic force microscopy images showed good correspondence between the experimental and simulated interference image, with flat islands which correspond to the destructive interference and narrow channels which correspond to the constructive interference fringes.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: AES Studies of Saturation in Surfactant Segregation Process in Co/Cu Multilayers
Autorzy:: Krupiński, M.
Dobrowolska, A.
Kąc, M.
Polit, A.
Zabila, Y.
Marszałek, M.
Tematy:: 82.80.Pv
68.55.-a
68.65.Ac; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1539147.pdf Link otwiera się w nowym oknie
Opis:: The chemical composition of successive layers in a Co/Cu multilayered system was studied during growth with Auger electron spectroscopy. Experiments were carried out on a sample with 10 repetitions of Co(1 nm)/Cu(2 nm) evaporated at a very low deposition rate in ultrahigh vacuum. A very small amount of Bi or Pb (0.06 nm) was deposited on each Cu film in the system. The experimental data have shown that the concentration of Bi and Pb increases with the number of deposited trilayers up to coverage corresponding to 5 trilayers. At that point the concentration of the surfactant saturated. The changes in the surfactant concentrations are described with a simple model depicting the interaction of the surfactant atoms with the system and how the evolution of the segregation processes. It allows the prediction of the saturation concentration and helps to explain the behaviour of various elements used as a surfactant. The comparison between the theoretical predictions and the experimental results is also discussed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Synthesis of Gold Nanoparticles Using Schiff Base
Autorzy:: Mihai, S.
Tematy:: 05.65.+b
36.40.-c
68.65.Ac; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1399716.pdf Link otwiera się w nowym oknie
Opis:: The Schiff base is used for the first time in the preparation of gold nanoparticles by the interaction of tris (triphenylphosphinegold)oxonium tetrafloroborate in acetonitrile medium. The gold nanostructures were characterized using UV-vis spectroscopy, X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The scanning electron microscopy allowed the examination of the morphology of the gold nanostructured film obtained by chemical deposition retains properties of individual particles and remain separated without undergoing aggregation.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Néels Magnetostatic Coupling in Sputtered Cu/Py/V/Py/MnIr/Cu Multilayers
Autorzy:: Urbaniak, M.
Brückl, H.
Stobiecki, F.
Luciński, T.
Reiss, G.
Tematy:: 75.70.Cn
68.65.Ac; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/2037183.pdf Link otwiera się w nowym oknie
Opis:: The correlation between magnetostatic or Néel's coupling and roughness of interfaces in sputtered Cu/Py/V/Py/MnIr/Cu multilayers was investigated with the help of atomic force microscopy and magnetometry. It is shown that the coupling strongly depends on the roughness of seed Cu layer which in turn depends on sputtering power. Roughness levels off after deposition of consecutive layers to about 0.2 nm rms.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Structure and stress in Au/Cu two-layer system during annealing at different temperature
Autorzy:: Chocyk, D.
Tematy:: 68.60.Bs
68.60.Dv
68.65.Ac; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1153076.pdf Link otwiera się w nowym oknie
Opis:: In this work, the Au/Cu two-layer systems, with the total thickness equal to 30 nm are studied. The two-layer systems were deposited by thermal evaporation in a UHV system on the silicon substrate at room temperature. After deposition the samples were annealed. We examined samples subjected to thermal cycle with the different maximum temperature. The X-ray diffraction and X-ray reflectometry are performed for systems before and after annealing. It was found that during the cycle of annealing above 150°C starts process of penetration of the Au layer by Cu atoms results in alloying. In Au/Cu systems, the final layer is the ordered Au/Cu₃ phase.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: XAFS Studies of the Behaviour of Bi in Co/Cu Multilayers
Autorzy:: Krupiński, M.
Kąc, M.
Polit, A.
Zabila, Y.
Zając, D.
Marszałek, M.
Kapusta, Cz.
Dobrowolska, A.
Tematy:: 61.05.cj
68.55.-a
68.65.Ac; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1809826.pdf Link otwiera się w nowym oknie
Opis:: The atomic environment of Bi atoms in the Co/Cu multilayered system was studied with X-ray absorption fine structure spectroscopy. Experiments were carried out on a Co(1 nm)/Cu(2 nm) system with 5 and 10 repetitions of Co/Cu evaporated with very low deposition rate in ultrahigh vacuum. A very small amount of Bi (0.06 nm) was deposited on each Cu film in the system. The X-ray absorption fine structure spectra were measured at the $BiL_3$ edge in the X-ray absorption near-edge structure and extended X-ray absorption fine structure ranges at the Beamline X1 of HASYLAB/DESY synchrotron laboratory in Hamburg. The experimental data showed different local neighbourhood of Bi, depending on the number of Co/Cu bilayer repetitions. The results are discussed in terms of the location and segregation of the Bi atoms as well as its possible oxidation ways.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Thermoelectric Effects in Spin Valves Based on Layered Magnetic Structures
Autorzy:: Kunert, H.
Barnaś, J.
Tematy:: 72.25.Mk
65.80.-g
68.65.Ac; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1032514.pdf Link otwiera się w nowym oknie
Opis:: General aspects of thermoelectric effects in spin valves consisting of two magnetic layers separated by a nonmagnetic spacing layer are considered, with the main focus on the spin Seebeck effects. The Seebeck and spin Seebeck effects are considered in both current-in-plane and current-perpendicular-to-plane geometries. The corresponding thermopower and spin thermopower in the macroscopic limit of electronic transport are also considered. Physical origin of the spin effects is discussed in detail.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: LT-InGaAs Layer Grown for Near Surface SESAM Application
Autorzy:: Jasik, A.
Muszalski, J.
Kosmala, M.
Pierściński, K.
Tematy:: 61.72.jj
68.55.ag
68.65.Ac
81.15.Hi
81.65.Rv; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1807666.pdf Link otwiera się w nowym oknie
Opis:: We have developed a mode-locked diode-pumped Yb:KYW laser generating nearly band-width limited pulses as short as 101 fs using semiconductor saturable absorber mirror (SESAM). With the nonsaturable losses of 1.94% and the modulation depth of 1.48% the self-starting and stable mode-locking was observed. The nonsaturable losses are mainly related to As_{Ga}^{0}-CB transitions in InGaAs QW absorbing layer and low temperature defects. Low temperature defects are eliminated by using higher growth temperature and lower ratio of group V to group III beam equivalent pressure than typically used. The InGaAs layer was grown by molecular beam epitaxy at the temperature as high as 420°C, under the V/III ratio as low as 10. No annealing was performed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Electromagnetic Waves Absorption by Graphene-Magnetic Semiconductor Multilayered Nanostructure in External Magnetic Field: Voight Geometry
Autorzy:: Kuzmin, D.
Bychkov, I.
Shavrov, V.
Tematy:: 41.20.Jb
42.25.Bs
68.65.Ac
68.65.Cd
68.65.Pq; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1386985.pdf Link otwiera się w nowym oknie
Opis:: Absorption of electromagnetic waves by graphene-magnetic semiconductor multilayered structure has been investigated for the Voight geometry with taking into account the dissipation processes. The possibility of control of electrodynamic properties of the structure by an external magnetic field, changing in number of periods of the structure, chemical potential of the graphene layers and temperature has been shown. Electrodynamics of the structure is also sensitive to polarization of the incident wave. The structure shows to be especially controllable at terahertz frequencies.
Dostawca treści:: Biblioteka Nauki

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