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Wyświetlanie 1-6 z 6
Tytuł:
Applicable Damage of High-$T_{c}$ YbaCuO Superconducting Tapes by Current and Laser Pulses
Autorzy:
Kiprijanovič, O.
Ašmontas, S.
Anisimovas, F.
Gradauskas, J.
Powiązania:
https://bibliotekanauki.pl/articles/1506252.pdf
Data publikacji:
2011-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.25.F-
74.25.fc
74.25.Op
85.25.Am
Opis:
Damage and irreversible damage of YBaCuO tapes with high density current after switching from superconducting to normal state are investigated. Quasi-homogeneous current distribution across the tape in superconducting state can cause perfect tape damage or irreversible damage when current is slightly above critical value. The model of the tape heating during the optically initiated switching from superconducting to normal state is proposed. Analysis of causes inducing damage shows necessity to consider $0.5T_{m}$ damage criterion because of strong current influence on the damage processes. Possible damage mechanisms are described and crack tips motion simultaneously with switching from superconducting to normal state is considered. Application of optically illuminated YBaCuO tapes with nanosecond duration current pulses on the base of the described mechanisms is proposed.
Źródło:
Acta Physica Polonica A; 2011, 119, 2; 256-258
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetoresistive Properties of Manganite-Based Heterojunctions
Autorzy:
Devenson, J.
Vengalis, B.
Lisauskas, V.
Oginskis, A.
Anisimovas, F.
Ašmontas, S.
Powiązania:
https://bibliotekanauki.pl/articles/1807945.pdf
Data publikacji:
2009-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.-i
71.30.+h
73.50.-h
Opis:
Hole-doped $La_{2/3}Ba_{1/3}MnO_{3}$ (LBaMO), $La_{2/3}Ca_{1/3}MnO_{3}$ (LCaMO) and $La_{2/3}Ce_{1/3}MnO_{3}$ (LCeMO) thin films were grown heteroepitaxially on 0.1 wt.% Nb-doped $SrTiO_{3}(100)$ (STON) substrates by magnetron sputtering. The prepared LBaMO/STON, LCaMO/STON, LCeMO/STON heterostructures demonstrated nonlinear rectifying current-voltage characteristics. Negative magnetorestance values have been indicated at low bias, meanwhile bias-dependent magnetoresistance has been measured at positive bias voltage values U > U_d where U_d is the interfacial potential, corresponding to a steep current increase at a forward bias.
Źródło:
Acta Physica Polonica A; 2009, 115, 6; 1130-1132
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reversible Resistive Switching in Electrically Nonhomogeneous $La_{0.67}Ca_{0.33}MnO_3$ Thin Films by Short Electrical Pulses
Autorzy:
Lučun, A.
Kiprijanovič, O.
Ašmontas, S.
Anisimovas, F.
Maneikis, A.
Sužied.lis, A.
Vengalis, B.
Powiązania:
https://bibliotekanauki.pl/articles/1813407.pdf
Data publikacji:
2008-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Gk
75.47.Lx
07.57.Kp
Opis:
Resistance changes in thin electrically nonhomogeneous $La_{0.67}Ca_{0.33}MnO_3$ films were investigated using electrical pulses of nanosecond duration in the 80-300 K temperature range. Two types of reversible switching to higher resistive states with different starting temperature induced by series of the positive pulses were observed. Possible mechanisms of the resistance switching by short electrical pulses in the vicinity of $T_m$ and at 80-90 K are discussed.
Źródło:
Acta Physica Polonica A; 2008, 113, 3; 1059-1062
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electroresistance of Electrically Nonhomogeneous La$\text{}_{0.67}$Ca$\text{}_{0.33}$MnO$\text{}_{3}$/MgO Thin Films
Autorzy:
Kiprijanovič, O.
Lučun, A.
Ašmontas, S.
Anisimovas, F.
Butkutė, R.
Maneikis, A.
Sužiedėlis, A.
Vengalis, B.
Powiązania:
https://bibliotekanauki.pl/articles/2047239.pdf
Data publikacji:
2007-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.50.Gr
73.50.Lw
73.63.Bd
Opis:
Current and electrical field-induced electroresistive effects were investigated for La$\text{}_{0.67}$Ca$\text{}_{0.33}$MnO$\text{}_{3}$/MgO thin films demonstrating nanosized electrical inhomogeneities. Two different models based on enhanced conductivity of intergrain boundaries by injecting spin-polarized carriers from ferromagnetic grains and electrical field-enhanced hopping of carriers in high resistance intergrain media were carried out to explain nonlinear electrical properties of the films.
Źródło:
Acta Physica Polonica A; 2007, 111, 1; 141-146
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Frequency Dependence of Electrical Response of Polycrystalline LCMO Thin Films
Autorzy:
Ašmontas, S.
Anisimovas, F.
Balevičius, S.
Cimmperman, P.
Gradauskas, J.
Lučun, A.
Stankevič, V.
Sužiedėlis, A.
Vengalis, B.
Žurauskienė, N.
Powiązania:
https://bibliotekanauki.pl/articles/2041721.pdf
Data publikacji:
2005-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Gk
75.47.Lx
07.57.Kp
Opis:
Influence of strong electric field in wide frequency range (from DC to 35 GHz) on electrical resistance of thin La$\text{}_{0.67}$Ca$\text{}_{0.33}$MnO$\text{}_{3}$ polycrystalline manganite films was investigated in the range of (78÷300) K. Different behavior of resistance change vs. temperature was observed when pulsed DC electric field and microwaves were applied to the films. When pulsed DC electric field is applied the electric-field-induced resistance change ("electroresistance") of manganite film depended nearly monotonically on temperature. However, in microwave electric fields a non-monotonic character of the electroresistance temperature dependence was observed. The dependence of the electroresistance on quality of manganite films was observed in case of microwaves. The experimental findings are explained assuming different electrical current mechanisms in case of DC and microwave fields. The applied voltage drops mainly across the grains of polycrystalline film due to a presence of displacement currents in case of microwaves, whereas in DC case the voltage drop is across the grain boundaries.
Źródło:
Acta Physica Polonica A; 2005, 107, 1; 193-197
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetoresistance of Polycrystalline La$\text{}_{0.7}$Ca$\text{}_{0.3}$MnO$\text{}_{3}$ Films in a Microwave Magnetic Field
Autorzy:
Lučun, A.
Butkutė, R.
Maneikis, A.
Kiprijanovič, O.
Anisimovas, F.
Gradauskas, J.
Sužiedėlis, A.
Vengalis, B.
Kancleris, Ž.
Ašmontas, S.
Powiązania:
https://bibliotekanauki.pl/articles/2047240.pdf
Data publikacji:
2007-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Gk
75.47.Lx
07.57.Kp
Opis:
We present new experimental evidence indicating the importance of magnetic field component of microwave field (f=9.4 GHz) for magnetoresistive properties of polycrystalline La$\text{}_{0.7}$Ca$\text{}_{0.3}$MnO$\text{}_{3}$ films. The microwave measurements revealed a different character of the temperature-dependent electrical resistance of polycrystalline La$\text{}_{0.7}$Ca$\text{}_{0.3}$MnO$\text{}_{3}$ films placed in the centre (maximal amplitude of H$\text{}_{10}$ wave vector) and at a narrow wall of the wave-guide (reduced H$\text{}_{10}$ amplitude). Theoretical estimations of the influence of substrate onto distribution of microwave electric and magnetic fields in the waveguide were performed using the finite-difference time-domain method.
Źródło:
Acta Physica Polonica A; 2007, 111, 1; 147-152
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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