Non-linear interaction of a transport current with an electromagnetic wave in high-Tc ceramics

Fisher, L. M.; Il'in, N.V.; Voloshin, I. F.; Baltaga, I. V.; Makarov, N. M.; Yampol’skiı̆, V. A.

doi:10.1016/0921-4534(92)90251-7

Cited by 13 publications

(3 citation statements)

References 6 publications

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“…It is known that in massive conductors an electric field is much less than magnetic field and with the so-called impedance accuracy one can omit electric field in Eqs. (10) and (11). That results in a well known statement that at the conductor surface magnetic components of falling and reflecting waves with the impedance accuracy have equal values and are added together.…”

Section: B{dt) -E{dt) = H 2 Cos(u} 2 T + X)-(h)mentioning

confidence: 95%

“…(3) shows that during the time intervals (16) the boundary conditions Eqs. (10) and (11) can only be satisfied by exciting a strong electric field. In the zeroth-approximation in a, we get…”

Section: Calculation Of the Surface Impedancementioning

confidence: 99%

“…This phenomenon is well known in the electrodynamics of metals (see, for example, Ref. [4]) and superconductors [5][6][7][8][9][10][11]. In superconducting plates, it occurs because the nonlinearity results in the increase of the penetration depth of the radiowave with the ac amplitude.…”

Section: Introductionmentioning

confidence: 98%

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Nonlinear Interaction of the Electromagnetic Waves Irradiating the Plate of a Hard Superconductor From the Opposite Sides

Derev’anko

Lyubimova

Lyubimov

et al. 2000

Magnetic and Superconducting Materials

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It is well-known that the size effect occurs in a conducting plate if the penetration depth of the electromagnetic wave irradiating the sample is of the same order as the plate thickness. At unilateral excitation, the size effect manifests itself as an abrupt growth of the surface resistance of the plate. It takes place due to the drastic increase of the electric field inside the sample under the condition of its full transparency. The electric field becomes of the same order as the magnetic field, and the surface resistance of the sample increases correspondingly. In the present paper we show that even at small amplitudes Hi of an incident wave (which we call the "base" wave with a frequency of ui) as it cannot penetrate through the whole volume of a hard superconductor, one can, nevertheless, observe the size effect by means of another wave (the "assisting" wave with an amplitude Hi and a frequency of 012), propagating in the opposite direction. This effect stems from the nonlinearity of superconducting media and does not depend essentially on the peculiarities of the nonlinearity mechanism. When the penetration regions of both waves overlap, the nonlinearity results in the appearance of all combined harmonics of the waves at every point of the sample. In particular, there exists a signal on the first harmonics u>\. As a result, the surface resistance on the frequency w\ of the base wave being small without the assisting wave, increases drastically when the penetration regions overlap each other. In the present paper we have studied the dependence of the surface impedance on the first frequency u>\ vs the amplitude #2 of the second wave. All the calculations in this paper were performed within the framework of the critical state model. The described effect of the stimulated transparency of the superconducting plate when acted upon by the assisting wave was observed experimentally.

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Section: B{dt) -E{dt) = H 2 Cos(u} 2 T + X)-(h)mentioning

confidence: 95%

Section: Calculation Of the Surface Impedancementioning

confidence: 99%