共查询到20条相似文献,搜索用时 0 毫秒
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K. A. Amosov S. A. Kochubei K. N. Naumockhin V. I. Makarov I. V. Khmelinskii N. M. Bazhin 《Journal of Applied Spectroscopy》1991,55(6):1250-1255
Reported to the All-Union Conference on Luminescence, devoted to the 100th anniversary of the birth of Academician S. I. Vavilov (26–28 March, 1991, Moscow). 相似文献
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It is proposed that the Zeeman effect of the 202 → 111 transition in sulfur dioxide be used as a magnetic field calibration standard. The recent accurate beam maser measurements on this transition by Ellenbroek and Dymanus have been confirmed by electric resonance measurements in the 111 level. The Zeeman splittings most useful for calibration purposes depend linearly on the magnetic field. For perpendicular selection rules the Zeeman coefficient is 0.5282(3) MHz/kG while parallel transitions have a 0.3722(3) MHz/kG Zeeman coefficient. The sign of the rotational magnetic moment of SO2 has been determined to be negative. 相似文献
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We report on theoretical studies of the influence of an in-plane magnetic field on the recently discovered strong radiation-induced magnetoresistance spike obtained in ultraclean two-dimensional electron systems. The most striking feature of this spike is that it shows up on the second harmonic of the cyclotron resonance. According to experiments, the effect of an in-plane magnetic field is to reduced dramatically the intensity of both, radiation-induced resistant spike and oscillations. We apply the radiation-driven electron orbits model in the ultraclean scenario. We are able to explain with the same physical mechanism the whole experimental response (spike and resistance oscillations). Accordingly, the increasing disorder in the sample caused by the in-planed magnetic field would be responsible of the quenching. Calculated results are in good agreement with experiments. 相似文献
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K. Ikeda S. K. Dhar M. Yoshizawa K. A. Gschneidner Jr. 《Journal of magnetism and magnetic materials》1991,100(1-3):292-321
The quenching of spin fluctuations by magnetic fields has been observed in heat capacity and electrical resistivity measurements at low temperatures for a series of highly exchange enhanced magnetic materials. These include: the weak itinerant electron ferromagnets Sc3In, Zr1−xHfxZn2 (0 x 0.2) and Ni3Al; the strong Pauli paramagnets RCo2 (R = Sc, Y and Lu), TiBe2 and Pd1−xNix (0 x 0.01); and the heavy fermion systems CeSn3, CeSix (x ≈ 1.85) an d UAl2. The reported quenching of spin fluctuations in scandium and palladium by magnetic fields is reviewed, and it appears that the initial observations and conclusions are incorrect, and that fields greater than 10 and 40 T, respectively, will be necessary to quench spin fluctuations in these metals. The behaviors of these spin fluctuators have been grouped into six classes. 相似文献
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I. F. Voloshin A. V. Kalinov L. M. Fisher V. A. Yampol’skiĭ 《Journal of Experimental and Theoretical Physics》2007,105(1):278-282
The evolution of the spatial distribution of the magnetic induction in a superconductor after the action of the alternating magnetic field perpendicular to the trapped magnetic flux has been analyzed. The observed stabilization of the magnetic induction profile is attributed to the increase in the pinning force, so that the screening current density becomes subcritical. The last statement is corroborated by direct measurements. 相似文献
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Zhu C 《Physical review letters》1993,71(14):2288-2291
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S. I. Bozhko 《JETP Letters》2014,99(8):487-495
The foundations of the focusing of electrons by a transverse magnetic field proposed by V.S. Tsoi in 1974 have been reviewed. The kinetics of electrons in condensed media and interactions of conduction electrons with interfaces has been studied by means of the focusing of electrons. Various applications of the focusing of charge carriers in low-dimensional, including two-dimensional, electron systems have been demonstrated. 相似文献
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We demonstrate that magnetic oscillations of a current-biased magnetic nanocontact can be parametrically excited by a microwave field applied at twice the resonant frequency of the oscillation. The threshold microwave amplitude for the onset of the oscillation decreases with increasing bias current, and vanishes at the transition to the auto-oscillation regime. Theoretical analysis shows that measurements of parametric excitation provide quantitative information about the relaxation rate, the spin transfer efficiency, and the nonlinearity of the nanomagnetic system. 相似文献
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A. Bousseksou N. Negre M. Goiran L. Salmon J.-P. Tuchagues M.-L. Boillot K. Boukheddaden F. Varret 《The European Physical Journal B - Condensed Matter and Complex Systems》2000,13(3):451-456
We report the first study of the effect of a high pulsed magnetic field on a spin transition complex in the solid state. The
high spin fraction was determined by optical reflectivity. Sizeable effects are observed for the well-known spin transition
solid Fe(Phen)2(NCS)2. In the hysteresis loop temperature range, an increase in the HS fraction is obtained, with an irreversible (reversible)
character in the ascending (descending) branch of the loop. The time dependence of the HS fraction provides information on
the kinetics of the spin-crossover process at the spin transition.
Received 23 February 1999 and Received in final form 8 June 1999 相似文献
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The possibility of semiconductor surface activation, which shows up as a long-term increase in the adsorption capacity in response to a short exposure to a pulsed magnetic field, is demonstrated for the first time. Magnetic-field-induced surface activation is studied on silicon, germanium, and gallium arsenide crystals. The effect revealed extends the capabilities of thin-film growth on the semiconductor surface. 相似文献