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81.
I. O. Troyanchuk M. V. Bushinsky V. M. Dobryanskii N. V. Pushkarev 《JETP Letters》2011,94(12):849-852
In layered Sr3YCo4O10.5 + δ-type cobaltites with different oxygen contents, we have observed a first order magnetic phase transition from the high-temperature
“ferromagnetic” state to the low-temperature antiferromagnetic state. The transition can be induced by an applied magnetic
field. It is accompanied by a significant hysteresis in the magnetic field (∼10 T) and temperature (∼10 K). A decrease and
an increase in the yttrium content lead to a purely “ferromagnetic” and antiferromagnetic behavior, respectively. 相似文献
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N. M. Olekhnovich A. N. Salak A. V. Pushkarev Yu. V. Radyush N. P. Vyshatko D. D. Khalyavin V. M. Ferreira 《Physics of the Solid State》2009,51(3):582-588
Physics of the Solid State - The dielectric properties of metastable high-pressure perovskite ceramics Bi(Mg1/2Ti1/2)O3 were studied by impedance spectroscopy at frequencies of 25 Hz-1 MHz at... 相似文献
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The results of an experimental investigation of acoustic vibrations (their frequency, amplitude, and attenuation coefficient) generated in a gas mixture as a result of the injection of a high-current pulsed electron beam into a closed reactor are presented. It is shown that the change in the phase composition of the initial mixture under the action of the electron beam leads to a change in the frequency of the sound waves and to an increase in the attenuation coefficient. By measuring the change in frequency, it is possible to evaluate with sufficient accuracy (about 2%) the degree of conversion of the initial products in the plasmochemical process. Relations describing the dependence of the sound energy attenuation coefficient on the size of the reactor and on the thermal and physical properties of the gases under study are derived. It is shown that a simple experimental setup measuring the parameters of acoustic waves can be used for monitoring the plasmochemical processes initiated by a pulsed excitation of a gas mixture. 相似文献
88.
This paper presents a model of the dynamic optogalvanic effect. On the basis of this model an explanation is given for the experimental data obtained in a neon gas-discharge plasma.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 2, pp. 84–89, February, 1987. 相似文献
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The crystal energy of the metallic hydrogen is found within the framework of the Wigner-Seitz method, in the form of the power series in the density parameter rs. The series appears to be absolutely convergent within the radius r0 = 4.2aB. The correspondence between this series and the perturbation theory expansion is established for terms of 2nd, 3rd, and 4th order. The value of the “tail” is estimated from the sum of all higher order terms of the first series. 相似文献
90.
A. F. Shestakov M. E. Burin D. L. Vorozhtsov V. A. Il’ichev A. P. Pushkarev M. A. Lopatin M. N. Bochkarev 《High Energy Chemistry》2012,46(5):323-330
By reactions of 1-(2-pyridyl)naphth-2-ol (pynH) with silylamides Ln[N(SiMe3)2]3 (Ln = Sc, Eu, Gd, or Tb), the Ln(pyn)3 complexes of the metals have been synthesized. Only the scandium complex in a THF solution has displayed photoluminescence (band with a maximum at 455 nm and a halfwidth of 65 nm). Electroluminescent properties have been revealed for the scandium and terbium complexes. In an ITO/TPD/Sc(pyn)3/Bath/Yb three-layer light emitting diode, the scandium complex exhibits yellow-green luminescence with a brightness of 4750 cd/m2 at a voltage of 21 V. The terbium complex Tb(pyn)3 in the same device has displayed a single, broad luminescence band with λmax = 570 nm due to excimer emission. By density functional theory quantum chemical calculations, different structures of the complexes have been revealed, mononuclear for Sc(pyn)3 and binuclear for Ln2(pyn)6. This difference in structure seems to be responsible for differences in electroluminescent activity between the synthesized complexes. 相似文献