Transformation magneto-statics and illusions for magnets

Sun, Fei; He, Sailing

doi:10.1038/srep06593

Cited by 26 publications

(29 citation statements)

References 30 publications

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“…[55]) is transformed into that of a different one (a perfect diamagnet) by enclosing the former in a shell emulating a negative-μ behavior. Other illusions such as magnifying or shrinking materials, cloaks, and anticloaks [56][57][58][59][60] can also be realized using the same scheme [55]. Another intriguing possibility that may eventually become possible based on our results may be the realization of exterior cloaks [35,36].…”

Section: -8mentioning

confidence: 87%

Negative permeability in magnetostatics and its experimental demonstration

et al. 2017

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The control of magnetic fields, essential for our science and technology, is currently achieved by magnetic materials with positive permeability, including ferromagnetic, paramagnetic, and diamagnetic types. Here we introduce materials with negative static permeability as a new paradigm for manipulating magnetic fields. As a first step, we extend the solutions of Maxwell magnetostatic equations to include negative-permeability values. The understanding of these new solutions allow us to devise a negative-permeability material as a suitably tailored set of currents arranged in space, overcoming the fact that passive materials with negative permeability do no exist in magnetostatics. We confirm the theory by experimentally creating a spherical shell that emulates a negative-permeability material in a uniform magnetic field. Our results open new possibilities for creating and manipulating magnetic fields, which can be useful for practical applications.

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Section: -8mentioning

confidence: 87%

Negative permeability in magnetostatics and its experimental demonstration

et al. 2017

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“…[16][17][18][19][20][21] Recently, the spirit of TO is extended to manipulate other waves or flows including acoustic wave, [22][23][24] thermal flow, [25][26][27][28][29][30][31] DC electric or magnetic field, and particle diffusion. [32][33][34][35][36][37][38][39] That is, the TO provides an interesting and promising method to manipulate multiple physical fields universally.…”

Section: Doi: 101002/adts201700004mentioning

confidence: 99%

Ultrathin Hydrogen Diffusion Cloak

Liu

Bai

et al. 2017

Advcd Theory and Sims

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For years, hydrogen damage is a fatal threat to metals and alloys in long-term service. This paper introduces the transformation optics theory in metamaterials to the diffusive field, and the design of an ultrathin hydrogen diffusion cloak. Thanks to the alternately and gradually changed diffusion coefficients in adjacent layers, the laminated cloak efficiently conducts the diffusive flow to shield the central region, and drastically reduces the diffusion flux in it. More importantly, the diffusion coefficients are designed following the Laplace equation instead of conventional linear transformation, hence the cloak has a very small thickness whose core/shell ratio is two magnitudes larger than traditional designs, but the diffusion flux is even one magnitude lower. The ultrathin hydrogen diffusion cloak with excellent performance provides a promising route for hydrogen protection.

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“…These applications include thermal cloaking, illusion and manipulation, and even acoustic cloaking, illusion and controlling. Though ''scattering'' does not apply or directly apply to these applications, similar methodologies can be borrowed in various designs [20,[63][64][65][66][67][68][69].…”

Section: Cloakmentioning

confidence: 99%

Manipulating scattering features by metamaterials

Mei

Tang

et al. 2016

EPJ Applied Metamaterials

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-We present a review on manipulations of electromagnetic scattering features by using metamaterials or metasurfaces. Several approaches in controlling the scattered fields of objects are presented, including invisibility cloaks and radar illusions based on transformation optics, carpet cloak using gradient metamaterials, dc cloaks, mantle cloaks based on scattering cancellation, ''skin'' cloaks using phase compensation, scattering controls with coding/ programmable metasurfaces, and scattering reductions by multilayered structures. Finally, the future development of metamaterials on scattering manipulation is predicted.

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Transformation magneto-statics and illusions for magnets

Cited by 26 publications

References 30 publications

Negative permeability in magnetostatics and its experimental demonstration

Negative permeability in magnetostatics and its experimental demonstration

Ultrathin Hydrogen Diffusion Cloak

Manipulating scattering features by metamaterials

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