Polarization analysis of ELF/VLF waves generated by beating of two HF waves in the polar ionosphere

2019 ◽  
Vol 196 ◽  
pp. 105133 ◽  
Author(s):  
Tong Xu ◽  
Michael Rietveld ◽  
Jian Wu ◽  
Guanglin Ma ◽  
Yanli Hu ◽  
...  
Keyword(s):  
Polarization Analysis ◽  
Polar Ionosphere ◽  
Vlf Waves

Imaging magnetic microstructure with SEMPA

1993 ◽  
Vol 51 ◽  
pp. 1032-1033
Author(s):  
M. H. Kelley ◽  
J. Unguris ◽  
R. J. Celotta ◽  
D. T. Pierce
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Scanning Electron Microscopy ◽  
Sandwich Structure ◽  
Magnetic Coupling ◽  
Polarization Analysis ◽  
Secondary Electrons ◽  
Magnetic Microstructure ◽  
Escape Depth ◽  
Scanning Electron

By measuring the spin polarization of secondary electrons generated in a scanning electron microscope, scanning electron microscopy with polarization analysis (SEMPA) can directly image the magnitude and direction of a material’s magnetization. Because the escape depth of the secondaries is only on the order of 1 nm, SEMPA is especially well-suited for investigating the magnetization of ultra-thin films and surfaces. We have exploited this feature of SEMPA to study the magnetic microstrcture and magnetic coupling in ferromagnetic multilayers where the layers may only be a few atomic layers thick. For example, we have measured the magnetic coupling in Fe/Cr/Fe(100) and Fe/Ag/Fe(100) trilayers and have found that the coupling oscillates between ferromagnetic and antiferromagnetic as a function of the Cr or Ag spacer thickness.The SEMPA apparatus has been described in detail elsewhere. The sample consisted of a magnetic sandwich structure with a wedge-shaped interlayer as shown in Fig. 1.

Studies of the structure and dynamics of theDregion of the polar ionosphere during solar flares in April 2004

2006 ◽  
Vol 6 (2) ◽  
Author(s):  
V. D. Tereshchenko ◽  
E. B. Vasil'ev ◽  
O. F. Ogloblina ◽  
V. A. Tereshchenko ◽  
S. M. Chernyakov
Keyword(s):  
Solar Flares ◽  
Polar Ionosphere ◽  
Structure And Dynamics

POLARIZATION ANALYSIS OF THE MAGNETIC DIFFUSE SCATTERING OF Na3Cr2P3O12

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-199-C8-200
Author(s):  
N. Fanjat ◽  
O. Schaerpf ◽  
J. L. Soubeyroux ◽  
A. J. Dianoux ◽  
G. Lucazeau
Keyword(s):  
Diffuse Scattering ◽  
Polarization Analysis

Structured Storm‐Time Polar Ionosphere and Its Drivers

2021 ◽  
pp. 239-252
Author(s):  
Jing Liu ◽  
Wenbin Wang ◽  
Alan G. Burns ◽  
Qinghe Zhang
Keyword(s):  
Polar Ionosphere

SANS polarization analysis at V4 SANS instrument of HMI Berlin

2008 ◽  
Vol 19 (3) ◽  
pp. 034009 ◽  
Author(s):  
U Keiderling ◽  
A Wiedenmann ◽  
A Rupp ◽  
J Klenke ◽  
W Heil
Keyword(s):  
Polarization Analysis ◽  
Sans Instrument

scholarly journals Polar patches observed by ESR and their possible origin in the cusp region

2000 ◽  
Vol 18 (9) ◽  
pp. 1043-1053 ◽  
Author(s):  
A. M. Smith ◽  
S. E. Pryse ◽  
L. Kersley
Keyword(s):  
Energy Distribution ◽  
Electron Density ◽  
Plasma Flow ◽  
Plasma Temperature ◽  
Soft Particle ◽  
Polar Ionosphere ◽  
Polar Cap ◽  
Particle Precipitation ◽  
Cusp Region ◽  
Reconnection Site

Abstract. Observations by the EISCAT Svalbard radar in summer have revealed electron density enhancements in the magnetic noon sector under conditions of IMF Bz southward. The features were identified as possible candidates for polar-cap patches drifting anti-Sunward with the plasma flow. Supporting measurements by the EISCAT mainland radar, the CUTLASS radar and DMSP satellites, in a multi-instrument study, suggested that the origin of the structures lay upstream at lower latitudes, with the modulation in density being attributed to variability in soft-particle precipitation in the cusp region. It is proposed that the variations in precipitation may be linked to changes in the location of the reconnection site at the magnetopause, which in turn results in changes in the energy distribution of the precipitating particles.Key words: Ionosphere (ionosphere-magnetosphere interactions; plasma temperature and density; polar ionosphere)

scholarly journals Generation of VLF waves in the ionosphere with coherent dual-site excitation

Radio Science ◽  
2007 ◽  
Vol 42 (3) ◽  
pp. n/a-n/a ◽  
Author(s):  
A. Y. Wong ◽  
E. Wei ◽  
J. Pau
Keyword(s):  
Vlf Waves ◽  
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