Penetration of radiofrequency electromagnetic field through doped lanthanum manganites / Rinkevich AB,Nosov AP,Vasillev VG,Vladimirova EV // PHYSICS OF METALS AND METALLOGRAPHY. - 2004. - V. 98, l. 5. - P. 462-468.

ISSN/EISSN:

0031-918X / нет данных

Type:

Article

Abstract:

Penetration of a radiofrequency electromagnetic field through plates of lanthanum manganites La0.85Pb0.15MnO3, La0.60Pb0.40MnO3, and La0.68Y0.07Ba0.25MnO3 has been studied in a frequency range of f = 20 kHz-300 MHz and at a frequency of 7.4 GHz under conditions where the thickness of the skin layer is both much greater and much lower than the sample thickness. The measurements have been performed in a temperature range including the magnetic phase transition. It is shown that, in spite of the similarity of static properties, the dynamic properties of the manganites studied differ substantially, and that the differences are pronounced more strongly in the frequency range above 1 MHz. In the ferromagnetic region, significant changes in the penetration coefficient occur upon magnetization for all compositions. The initial dynamic magnetic permeability has been estimated. Due to the effect of dispersion, the decrease in the dynamic magnetic permeability in manganites doped with lead begins at frequencies on the order of a few MHz; in the manganites doped with barium and yttrium, substantial changes in the coefficient of penetration of electromagnetic field are observed up to frequencies on the order of 200 MHz. The changes in the penetration coefficient in the ferromagnetic region are primarily due to changes in the dynamic magnetic susceptibility rather than in the magnetoresistance.

Author keywords:

MAGNETORESISTANCE MANGANITES; GIANT MAGNETORESISTANCE; SURFACE-RESISTANCE; ABSORPTION

DOI:

нет данных

Web of Science ID:

ISI:000225674600002

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	NOV
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	MAGNETORESISTANCE MANGANITES; GIANT MAGNETORESISTANCE; SURFACE-RESISTANCE; ABSORPTION
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
ResearcherID-Numbers	Nosov, Alexandr/A-3003-2013 Rinkevich, Anatoly/I-5296-2013
ORCID-Numbers	Nosov, Alexandr/0000-0003-1475-0059 Rinkevich, Anatoly/0000-0002-1277-384X
Number-of-Cited-References	13
Journal-ISO	Phys. Metals Metallogr.
Doc-Delivery-Number	878VF