Title :
Magnetic-field-assisted giant penetration of a radio-frequency electromagnetic field in lanthanum manganites
Author :
Rinkevich, A. ; Nossov, A. ; Rigniant, M. ; Ustinov, V. ; Vassiliev, V. ; Vladimirova, E. ; Slobodin, B.
Author_Institution :
Inst. of Metal Phys., Acad. of Sci., Ekaterinburg, Russia
fDate :
1/1/2002 12:00:00 AM
Abstract :
The penetration of an electromagnetic field in the frequency range of 20 kHz to 30 MHz through the plates of bulk polyerystalline sintered La0.60Pb0.4MnO3 and La0.70Y 0.07Ba0.23MnO3 manganites was studied. A giant increase, up to 10 times, of the transmission coefficient, on application of the magnetic field, was found. Skin depth variations were caused mainly by variation of the dynamical reversible magnetic permeability. The contribution of the magnetic permeability dispersion to the frequency dependence of skin depth was clarified
Keywords :
barium compounds; colossal magnetoresistance; ferromagnetic materials; lanthanum compounds; lead compounds; magnetic permeability; skin effect; yttrium compounds; 20 kHz to 30 MHz; La0.60Pb0.4MnO3; La0.70Y0.07Ba0.23MnO3; frequency dependence; magnetic permeability dispersion; magnetic-field-assisted giant penetration; radio-frequency electromagnetic field; sintered; skin depth variations; transmission coefficient; Electromagnetic fields; Frequency dependence; Lanthanum; Magnetic field measurement; Magnetic fields; Magnetic materials; Magnetic resonance; Permeability; Radio frequency; Skin;
Journal_Title :
Magnetics, IEEE Transactions on
