Bi-layer steady state current cloak

Zeng, Lunwu

doi:10.1016/j.physleta.2014.01.040

Cited by 16 publications

(7 citation statements)

References 22 publications

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“…The simplest design of a cloak is the core-shell structure successfully designed and tested for cloaking of DC current [10], [11], heat flow [12], diffusion of ions [13] and demonstration of optical invisibility in scattering media [14]. In case of magnetic cloak the core tube from superconductor is surrounded by a ferromagnetic tube.…”

Section: Cloak Constructionmentioning

confidence: 99%

Magnetic cloak for low frequency AC magnetic field

Solovyov

Šouc

Gömöry

2014

IEEE Trans. Appl. Supercond.

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Metal detection at low frequency (tens or hundreds of Hertz) is usually based on the phase and/or amplitude changes of the magnetic field measured in vicinity of the examined object by a system of coils. We have verified that it is possible to avoid such detection by putting the object into the shell from several layers of superconducting and ferromagnetic materials. When properly designed such structure can act as an invisibility cloak for magnetic field. In our laboratory, a small prototype of magnetic cloak with cylindrical shape has been manufactured. It was tested for hiding small copper and iron cylinders placed in AC magnetic field with the frequency of 72 Hz. The results show a significant reduction of the "visibility" of these cylinders determined by the phase and amplitude detection of voltage induced in a pick-up coil. The cloaking effect better than 80% was observed for the AC fields below 1.5 mT.Index Terms-Composite materials, high-temperature superconductors, magnetic cloak, magnetic shielding. 1051-8223

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Section: Cloak Constructionmentioning

confidence: 99%

Magnetic cloak for low frequency AC magnetic field

Solovyov

Šouc

Gömöry

2014

IEEE Trans. Appl. Supercond.

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“…Many achievements of invisibility cloak have been motivated thanks to the pioneering theoretical work. [1][2][3][4] Inspired by those theoretical works, varieties of electromagnetic cloak, [5][6][7][8][9][10][11] acoustic cloak, [12][13][14] matter wave cloak, 15 mass diffusion cloak, 16 heat cloak, [17][18][19][20] magnetic cloak, [21][22][23] dc electric cloak [24][25][26] have been demonstrated in the past few years. It is very difficult to construct a perfect invisible electromagnetic cloak by natural material, for it requires anisotropic medium.…”

Section: Introductionmentioning

confidence: 99%

“…Utilizing superconductor and ferromagnetic, Gömöry et al experimentally realized a magnetic cloak. 22 By the similar method, Zeng designed a bi-layer steady current cloak by use of conductor and insulator, 25 the bi-layer steady current cloak did not require anisotropic metamaterial owing to zero conductivity of insulator. Topological insulator is a new state of quantum matter, the concept of the topological insulator can be defined using both with the topological field theory [27][28][29][30][31][32] and topological band theory.…”

Section: Introductionmentioning

confidence: 99%

Cloaking magnetic field and generating electric field with topological insulator and superconductor bi-layer sphere

2017

AIP Advances

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When an electric field is applied on a topological insulator, not only the electric field is generated, but also the magnetic field is generated, vice versa. I designed topological insulator and superconductor bi-layer magnetic cloak, derived the electric field and magnetic field inside and outside the topological insulator and superconductor sphere. Simulation and calculation results show that the applied magnetic field is screened by the topological insulator and superconductor bi-layer, and the electric field is generated in the cloaked region. © 2017 Author (s)

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“…Inspired by those theoretical works, varieties of electromagnetic cloak [5][6][7][8][9][10][11], acoustic cloak [12][13][14], matter wave cloak [15], mass diffusion cloak [16], heat cloak [17][18][19][20], magnetic cloak [21][22][23], dc electric cloak [24][25][26] and electrostatic cloak [27] have been theoretically designed and experimentally demonstrated. The first experiment demonstrated invisible cloak using metamaterial with simplified material parameters [5].…”

Section: Introductionmentioning

confidence: 99%

“…Utilizing superconductor and ferromagnetic, Gömöry et al experimentally realized a magnetic cloak [22], which did not require anisotropic metamaterial owing to zero permeability of superconductor. By the similar method, we designed a bi-layer steady current cloak by the use of conductor and insulator [25], the bi-layer steady current cloak did not require anisotropic metamaterial owing to zero conductivity of insulator. Utilizing bulk natural materials, Han et al also designed a same steady current cloak [26].…”

Section: Introductionmentioning

confidence: 99%