scholarly journals Frequency and Magnetic Field Dependence of the Skin Depth in Co-rich Soft Magnetic Microwires

2016 ◽  
Vol 5 (3) ◽  
pp. 39
Author(s):  
A. Zhukov ◽  
A. Talaat ◽  
M. Ipatov ◽  
A. Granovsky ◽  
V. Zhukova

We studied giant magnetoimpedance (GMI) effect in magnetically soft amorphous Co-rich microwires in the extended frequency range. From obtained experimentally dependences of GMI ratio on magnetic field and different frequencies we estimated the penetration depth and its dependence on applied magnetic field and frequency

1965 ◽  
Vol 140 (5A) ◽  
pp. A1678-A1688 ◽  
Author(s):  
J. F. Cochran ◽  
C. A. Shiffman

2021 ◽  
Vol 91 (2) ◽  
pp. 308
Author(s):  
А.Б. Ринкевич ◽  
Е.А. Кузнецов ◽  
Д.В. Перов ◽  
М.А. Миляев

Experimental study of microwave giant magnetoresistive effect in wave reflection has been carried out in frequency range from 26 to 38 GHz. The magnitude of the effect is obtained and its magnetic field dependence is defined. The experiments are carried out with (CoFe)/Cu superlattices, which have giant magnetoresistance. Calculations of the magnetic field dependence of microwave reflection coefficient are fulfilled. The measured values of reflection coefficient variations are found to be greater than the calculated ones. This difference is connected with approximation within which the superlattice is replaced by the uniform metallic plate in calculations. A frequency dependence of microwave giant magnetoresistive effect in reflection is also observed. This dependence is explained by the influence of the waveguide impedance where the sample is placed in measurements.


1998 ◽  
Vol 60 (1) ◽  
pp. 111-132 ◽  
Author(s):  
UWE MOTSCHMANN ◽  
KARL-HEINZ GLASSMEIER

In a nongyrotropic plasma no symmetry of the distribution function with respect to the velocity space coordinates exists, and, in particular, axial symmetry with respect to the background magnetic field is broken. The propagation of small-amplitude waves and their stability under such conditions are studied here in the framework of linearized Maxwell–Vlasov theory. Two types of nongyrotropic distributions are investigated: stationary and rotating distributions. Stationary nongyrotropy may be maintained by sources and sinks in velocity space. Gyrophase organization couples modes that are decoupled in a gyrotropic plasma, and drives unstable waves in a parallel as well as a perpendicular propagation direction with respect to the background magnetic field. In a rotating nongyrotropic plasma there is an additional coupling of waves at different frequencies that is analogous to a three-wave scattering process. The frequency difference of the coupling modes is just the gyrofrequency of the rotating distribution or its harmonics. This frequency-shifted coupling distributes the energy in a cascade fashion over an extended frequency range. It tends to stabilize the plasma and inhibits wave excitation.


1988 ◽  
Vol 49 (C8) ◽  
pp. C8-461-C8-462 ◽  
Author(s):  
H. Fütterer ◽  
T. Yohannes ◽  
H. Bach ◽  
J. Pelzl ◽  
K. Nahm ◽  
...  

2020 ◽  
pp. 53-58
Author(s):  
A. V. Koudelny ◽  
I. M. Malay ◽  
V. A. Perepelkin ◽  
I. P. Chirkov

The possibility of using bolometric converters of microwave power from the State primary standard of the unit of power of electromagnetic waves in waveguide and coaxial paths GET 167-2017, which has a frequency range from 37,5 to 78,33 GHz, in an extended frequency range up to 220 GHz, is shown. Studies of semiconductor bolometric converters of microwave power in an extended frequency range have confirmed good agreement and smooth frequency characteristics of the effective efficiency factor of the converters. Based on the research results, the State working standard of the unit of power of electromagnetic waves of 0,1–10 mW in the frequency range from 37,5 to 220 GHz 3.1.ZZT.0288.2018 was approved. The technical characteristics of the working standard of the unit of power of electromagnetic oscillations in an extended frequency range from 37,5 to 220 GHz are given.


1991 ◽  
Vol 58 (11) ◽  
pp. 1205-1207 ◽  
Author(s):  
R. H. Ono ◽  
L. F. Goodrich ◽  
J. A. Beall ◽  
M. E. Johansson ◽  
C. D. Reintsema

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