magnetic wave
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2021 ◽  
Author(s):  
Sangwha Yi

In the general relativity theory, we find electro-magnetic wave functions of Cosmic Microwave Background and Schwarzschild space-time. Specially, this article is that electromagnetic wave equations are treated by gauge fixing equations in Robertson-Walker space-time and Schwarzschild space-time.


2021 ◽  
pp. 136580
Author(s):  
Chun-Zheng Wang ◽  
Wen-Ya Wu ◽  
Qi-Ye Shou ◽  
Guo-Liang Ma ◽  
Yu-Gang Ma ◽  
...  

2021 ◽  
Vol 916 (2) ◽  
pp. L10
Author(s):  
Yikang Wang ◽  
Takaaki Yokoyama ◽  
Haruhisa Iijima
Keyword(s):  

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
Wen-Ya Wu ◽  
Chun-Zheng Wang ◽  
Qi-Ye Shou ◽  
Yu-Gang Ma ◽  
Liang Zheng

2021 ◽  
Vol 13 (3) ◽  
pp. 473-480
Author(s):  
Yihan Jin ◽  
Xi Luo ◽  
Jinglin Zhang ◽  
Dongliang Zhao ◽  
Kewei Gao

Micro-emulsion method is adopted to synthesis rGO-Fe3O4-PANI (reduced graphene oxide-Fe3O4-polyaniline) ternary nano-composites. With the different contents of aniline (0.1 g, 0.2 g, 0.3 g) added in production, the corresponding final products are named as sample 1, sample 2, sample 3, respectively. The results of TEM indicate that the mean size of Fe3O4 nano-particles is 14 nm and they are anchored onto rGO slice. There are some PANI polymer wrinkles distributed on the rGO surface uniformly. The electro-magnetic data demonstrate that sample 1 possess a great enhancement of the electro-magnetic wave absorption abilities and frequency bandwidth among the three samples. The RLmin (minimum reflection loss) value of sample 1 is -44.16 dB at 4.29 GHz with 5 mm coating thickness and 1.77 GHz (3.72-4.94 GHz, 13.33-13.88 GHz) frequency bandwidth (RL <italic/> -10 dB). We can believe that this kind of nano-composites will have a promising application in the future.


2021 ◽  
Vol 13 (3) ◽  
pp. 447-454
Author(s):  
Yihan Jin ◽  
Xi Luo ◽  
Jinglin Zhang ◽  
Yipeng Yu ◽  
Jing An ◽  
...  

Chemical coprecipitation method, hydrothermal method and micro-emulsion method were adopted to prepare pure Fe3O4 (X1) magnetic nano-particles, reduced graphene oxide-Fe3O4 (X2) binary composites and reduced graphene oxide-Fe3O4-polyaniline (X3) ternary composites. The morphology, structure and magnetic performance were characterized by X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM) and vibration sample magnetism (VSM). The result of TEM showed that Fe3O4 nano-particles distributed uniformly on the surface of graphene and PANI matrix and the mean size was bout 13~14 nm. The electromagnetic data was tested by vector network analyzer demonstrating that the minnimum reflection loss (RLmin) value of X3 was -53.94 dB at 16.1 GHz with 1.5 mm thickness and 3.82 GHz (14.18~18 GHz) absorbing bandwidth (RL<italic/>-10 dB). Compared with pure magnetic Fe3O4 powders and rGO-Fe3O4 binary composites, the rGO-Fe3O4-PANI ternary composites were conduced to a great reinforce of the electro-magnetic wave absorbing properties and absorbing bandwidth.


2021 ◽  
Vol 1005 ◽  
pp. 121770
Author(s):  
Hao-jie Xu ◽  
Jie Zhao ◽  
Yicheng Feng ◽  
Fuqiang Wang
Keyword(s):  

Author(s):  
L.V. Lysenko ◽  
A.P. Korzhavyi ◽  
A.V. Romanov ◽  
V.K. Shatalov ◽  
A.V. Chelenko

The theoretical dependences arising from the dimensionless Lysenko complex for studying the transport of momentum, which determine the force interaction of photons, are considered. When deriving the force interaction equation, a model is adopted which takes into account that the product of the magnetic and electric charge is equal to the angular momentum, and the product of the magnetic and electric constant gives the value inverse to the square of the speed of light. The equation of the magnetic wave is obtained. From the dimensionless complex of energy-technological processes, the transport equation for the substance of the pulse, which determines the force interaction of photons, is obtained It is shown that such force interaction allows us to give a new interpretation of the nature of light and the energy mc2: the energy of one photon (mfc2)/2, and the energy of two photons mfc2. It is confirmed that the three forms of substance, energy and impulse (angular momentum) give the physical diversity of the material world.


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