#cloak material

[intelligentliving]

This Material Could Make An Invisibility Cloak That’s Heat Sensitive Too

Researchers in South Korea are developing a cloak that makes soldiers invisible to regular cameras and infrared-based night vision ones. The artificial “skin,” as they’re calling it, allows the wearer to blend in perfectly with his or her surroundings. The skin can camouflage itself like a chameleon blending into the...

[cosmictoquantum-blog]

'Antimagnet’ renders magnets invisible — Magnetic cloak could bring medical benefits — and security risks.

Physicists have already unveiled invisibility cloaks that can hide objects from light, sound, seismic and even water waves. Now researchers report a cloak that can hide objects from static magnetic fields. This 'antimagnet' could have medical applications, but might also subvert airport security.

Writing in Science1, a team of theorists led by Alvaro Sanchez at the Autonomous University of Barcelona in Spain, together with experimentalists at the Slovak Academy of Sciences in Bratislava, describe a magnetic cloak made with inexpensive, readily available materials.

The cloak's interiorpel external field lines, whereas the ferromagnet tries to draw them in — together, the two layers cancel each other out. To test the antimagnet, the Slovak group cooled the cloak with liquid nitrogen to activate the superconductor, and placed it in a static, uniform magnetic field with a strength of 40 millitesla. Using a measuring device called a Hall probe to map the magnetic field, the researchers found that the field lines did not enter the cloak, even through from the outside they appeared to pass straight through. They say that theirs is an 'exact' cloak — one for which the cloaking could, in principle, be made perfect using currently available materials. (Read More)