Instability of a strong pulse current in a tungsten plate / Rinkevich AB,Ustinov VV // JOURNAL OF PHYSICS-CONDENSED MATTER. - 1997. - V. 9, l. 9. - P. 2065-2074.

ISSN/EISSN:

0953-8984 / нет данных

Type:

Article

Abstract:

The instability of a strong pulse current is observed in a plate of pure tungsten. The instability appears at low temperatures if the plate is placed in a high magnetic field parallel to the current direction. The magnetic field of the alternating current in the sample is detected by making use of a Hall probe. The inherent frequencies of the instability currents are some tens of hertz. Their amplitude ranges up to about hundreds of milliamperes. The primary directions of the instability fields are along the steady magnetic fields, so that the instability currents have a component at right angles to the initial current direction. There is a threshold value of the amplitude of the pulse current at the beginning of instability. It has been found that the threshold value depends on the steady magnetic induction and is reduced significantly when the induction increases. The amplitude of the instability currents under study exhibits features of the dynamical chaos regime. The conversion into the chaos regime is effected by the formation of turbulent time intervals intermittent with laminar time intervals. It was found experimentally that the occurrence of the current instability is accompanied by ultrasonic oscillations. The observed instability is attributable to the fact that the magnetic field of the current pulses changes the trajectories of electrons. A set of equations has been proposed in order to explain the oscillatory behaviour of the fields of instability. This set contains two differential equations of parabolic type like the distributed parameter system with diffusion.

Author keywords:

RESISTANCE; METALS

DOI:

10.1088/0953-8984/9/9/018

Web of Science ID:

ISI:A1997WM29200018

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	MAR 3
Publisher	IOP PUBLISHING LTD
Address	DIRAC HOUSE, TEMPLE BACK, BRISTOL, ENGLAND BS1 6BE
Language	English
Keywords-Plus	RESISTANCE; METALS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
ResearcherID-Numbers	Rinkevich, Anatoly/I-5296-2013 Ustinov, Vladimir/G-7501-2011
ORCID-Numbers	Rinkevich, Anatoly/0000-0002-1277-384X Ustinov, Vladimir/0000-0002-5155-7947
Number-of-Cited-References	16
Usage-Count-Since-2013	1
Journal-ISO	J. Phys.-Condes. Matter
Doc-Delivery-Number	WM292