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Wyszukujesz frazę "62.30.+d" wg kryterium: Temat

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    Wyświetlanie 1-10 z 10
    Tytuł:
    Applications of a compact "water window" source for investigations of nanostructures using SXR microscope
    Autorzy:
    Torrisi, A.
    Wachulak, P.
    Fahad Nawaz, M.
    Bartnik, A.
    Adjei, D.
    Vondrová, Š.
    Turňová, J.
    Jančarek, A.
    Fiedorowicz, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1065141.pdf
    Data publikacji:
    2016-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    52.38.-r
    42.30.-d
    42.62.-b
    87.59.-e
    68.37.Yz
    07.85.Tt
    41.50.+h
    42.79.Dj
    Opis:
    A compact soft X-ray microscope based on a nitrogen double-stream gas puff target soft X-ray source, operating at He-like nitrogen spectral line at the wavelength of λ =2.88 nm is presented. The desk-top size microscope was successfully demonstrated in transmission mode using the Fresnel zone-plate objective and it is suitable for soft X-ray source microscopy in the "water window" spectral range (λ = 2.3÷ 4.4 nm). Details about the soft X-ray source source, the microscope and an example of application in the biomedical field are shown and discussed.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 2; 169-171
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High-Frequency Susceptibilities of Inhomogeneous Magnetoelastic Medium
    Autorzy:
    Ignatchenko, V. A.
    Erementchouk, M. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1964778.pdf
    Data publikacji:
    1997-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.30.+d
    75.80.+q
    61.43.Er
    Opis:
    A response of an inhomogeneous magnetoelastic medium with the zero-mean magnetostriction to high-frequency elastic and electromagnetic fields is studied. It is shown that diagonal susceptibilities have the resonance anomalies in the vicinity of the frequency of the magnetoelastic resonance, while the coefficients of crossing excitations are equal to zero.
    Źródło:
    Acta Physica Polonica A; 1997, 92, 2; 415-418
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of Yttrium-Substituted NiZn Ferrites
    Autorzy:
    Jančárik, V.
    Ušák, E.
    Šoka, M.
    Ušáková, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1367108.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Gg
    75.30.Cr
    75.60.-d
    74.62.Dh
    Opis:
    Polycrystalline NiZn ferrite doped with a small amount of $Y^{3+}$ ions and having the composition of $Ni_{0.42}Zn_{0.58}Y_{x}Fe_{2-x}O_{4}$, where x=0.00, 0.01, 0.02, 0.04, 0.06, 0.08 and 0.10, was analyzed. Specimens were prepared by the ceramic method. Thermo-magnetic analysis and evaluation of hysteresis loops parameters were chosen as main examination methods in this study. Various parameters, such as Curie temperature $T_{C}$, coercive field $H_{c}$, remanent magnetic flux density $B_{r}$, hysteresis loop area and amplitude/initial permeability were studied at low frequencies.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 90-91
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methods and Ways of Piezoelectric Accelerometers Fastening on the Objects of Research
    Autorzy:
    Korobiichuk, I.
    Bezvesilna, O.
    Kachniarz, M.
    Koshovyj, M.
    Kvasnikov, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030986.pdf
    Data publikacji:
    2018-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.F-
    62.30.+d
    63.20.dd
    77.65.Fs
    Opis:
    Methods and ways of piezoelectric measuring converters fastening on the objects of research are considered in the article. Piezoelectric accelerometers are sensors of a contact type, they have a mechanical contact with the object of research. The peculiarity of such connection is the fact that the object immediately has an influence on the output signal of the accelerometer. Therefore, study of methods and ways of piezoelectric accelerometers fastening on the objects of research is, undoubtedly, topical. Their advantages and disadvantages are specified. Recommendations about the choice of the way of piezoelectric measuring converters fastening on the objects of research depending on the operating conditions are made.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 4; 1112-1115
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of Spin-Dependent Mechanical Friction at Atomic Level
    Autorzy:
    Gzik-Szumiata, M.
    Szumiata, T.
    Morozow, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030428.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.Qp
    46.55.+d
    75.30.Et
    71.70.Gm
    75.50.Bb
    75.45.+j
    Opis:
    In this work a simple 2D model of pseudostatic friction at atomic level has been prepared, in the frame of which both Lennard-Jones potential and spin-dependent term of exchange interaction has been included. As an example, it has been demonstrated, that for iron both average lateral and normal forces between atoms of "base" and "slider" in the tribological node are altered through the change of relative direction of spins, by over a dozen of percent, when the interatomic distance is comparable to the lattice constant. Spin-dependent correction of atomic-level friction coefficient has been estimated.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 713-715
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New Method to Calculate Spatial Distribution of Acousto-Optic Figure of Merit in Crystals
    Autorzy:
    Muromets, A.
    Trushin, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1383519.pdf
    Data publikacji:
    2015-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.20.hb
    42.79.Jq
    43.35.Cg
    62.30.+d
    46.15.-x
    78.20.Bh
    Opis:
    We propose a novel method to calculate acousto-optic figure of merit in crystals. Calculations are performed in laboratory coordinate system where Z'-axis is collinear with wave vector of ultrasound and the Fresnel equation is considered as an equation on the third component of refractive index vector. The method is applicable to both uniaxial and biaxial crystals. In this paper, we compared obtained values of acousto-optic figure of merit with values from literature data for uniaxial crystals such as paratellurite, lithium niobate, tellurium and for biaxial crystals such as lead and strontium tetraborates. Calculations in paratellurite were carried out for slow-shear acoustic wave propagating along [110] crystal axis. In lithium niobate crystal, we perform comparison with results for geometry of acousto-optic interaction where acoustic wave vector forms 88° angle with X crystal axis and 150.4° angle with Z crystal axis. In tellurium crystal, we investigate geometries applied in infrared deflectors. In $SrB_4O_7$ and $PbB_4O_7$ crystals we analyze acousto-optic characteristics of slow-shear mode propagating along [100] crystal axis. Spatial distributions of acousto-optic figure of merit and acoustic frequency for the mentioned acousto-optic interaction geometries are presented.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 1; 93-95
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pressure Induced Transitions in Heavy-Fermion Systems footnotemark
    Autorzy:
    Zhang, Sun
    Dong, Yi-Qiao
    Powiązania:
    https://bibliotekanauki.pl/articles/1401900.pdf
    Data publikacji:
    2015-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Mb
    75.20.Hr
    71.28.+d
    74.62.Fj
    Opis:
    In this paper, the electron-type heavy-fermion system and the hole-type heavy-fermion system are classified by means of the cell-volume difference between two typical valence states of f ions. Two kinds of transitions induced by pressure are studied theoretically within a unified picture presented for both two types of heavy-fermion systems. Among these transitions, the incoherence-to-coherence transition in the electron-type heavy-fermion system is confirmed intensively in experiments, while the coherence-to-incoherence transition in the hole-type heavy-fermion system is discussed as a prediction for further observations.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 3; 389-393
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Scattering of Elastic Waves in a Quasi-One-Dimensional Cavity: Theory and Experiment
    Autorzy:
    Báez, G.
    Cobián-Suárez, M.
    Martínez-Argüello, A.
    Martínez-Mares, M.
    Méndez-Sánchez, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399047.pdf
    Data publikacji:
    2013-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    46.40.Cd
    62.30.+d
    03.65.Nk
    73.21.Fg
    Opis:
    We study the scattering of torsional waves through a quasi-one-dimensional cavity both from the experimental and theoretical points of view. The experiment consists of an elastic rod with square cross-section. In order to form a cavity, a notch at a certain distance of one end of the rod was grooved. To absorb the waves, at the other side of the rod, a wedge, covered by an absorbing foam, was machined. In the theoretical description, the scattering matrix S of the torsional waves was obtained. The distribution of S is given by Poisson's kernel. The theoretical predictions show an excellent agreement with the experimental results. This experiment corresponds, in quantum mechanics, to the scattering by a delta potential, in one dimension, located at a certain distance from an impenetrable wall.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 6; 1069-1073
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stress Monitoring in Steel Elements via Detection of AC Magnetic Permeability Changes
    Autorzy:
    Szumiata, T.
    Hibner, K.
    Dziewiecki, K.
    Mazur, Z.
    Gockiewicz, A.
    Gzik-Szumiata, M.
    Górka, B.
    Witoś, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030407.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.80.+q
    75.60.Ej
    75.50.Bb
    75.30.Gw
    62.20.D-
    Opis:
    The influence of mechanical stress on low frequency AC magnetic permeability was studied. The cold-drawn bars with C45 steel were subjected to investigation. The tensile stress (within elastic regime) was applied by means of material testing machine. Simple measuring system was assembled, which consisted of: function generator with magnetizing coil, detection coil and precise AC voltmeter. The registered changes of induced voltage were proportional to the change of magnetic permeability of the stretched rods. The obtained results were almost frequency-independent due to low frequency limit (250-500 Hz, weak eddy currents, no spin-origin energy dissipation). A significant magneto-mechanical hysteresis was observed slightly evolving from cycle to cycle with tendency of stabilization. The extension of basic Stoner-Wohlfarth model of magnetic permeability allowed to fit the data reproducing hysteretic behavior and considering the relaxation of the internal stress. The proposed, low-cost method is suitable in the industrial applications for stress control in large-sized steel elements.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 719-721
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural Analysis of Some Alkali Diborate Glasses
    Autorzy:
    Saddeek, Y.
    Gaafar, M.
    Abd El-Aal, N.
    Abd El-Latif, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807784.pdf
    Data publikacji:
    2009-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.43.Fs
    62.30.+d
    65.60.+a
    Opis:
    This manuscript presents a theoretical analysis of the correlation between the computed bulk modulus and the structure of a series of multicomponent sodium diborate based glasses in terms of the bond compression model. The main parameters in the analysis were the computed elastic moduli, the average stretching force constant and the average atomic ring size. These parameters were calculated for every glass series and for every glass composition. The results showed that the average force constant and the elastic moduli of these glasses are sensitive to the decrease in the sodium diborate content. This behaviour was attributed to the increase in the molar volume, and to the role of the different modifiers.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 2; 211-216
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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