Using superconductor and ferromagnetic materials,European researchers have developed a device that hides its contents to make them invisible to a static magnetic field. Researchers at University of Barcelona,led by Alvar,lecturer in Physics,put forward the mathematical formula to design the device.The device features a cylinder with two concentric layers.
While the inner layer consists of a superconducting material that repels magnetic fields,the outer layer is a ferromagnetic layer that attracts them.Placed in magnetic field,the device has no effect on field lines,showing neither a shadow, nor a reflection.So an object inside the device cannot be detected.
According to the researchers,the device represents a step towards the invisibility of light.There are many applications,for some cars,ships or submarines.The device could also be used for patients who have a pacemaker and need an MRI of a knee or other body part,so the image would not be distorted.
While the inner layer consists of a superconducting material that repels magnetic fields,the outer layer is a ferromagnetic layer that attracts them.Placed in magnetic field,the device has no effect on field lines,showing neither a shadow, nor a reflection.So an object inside the device cannot be detected.
According to the researchers,the device represents a step towards the invisibility of light.There are many applications,for some cars,ships or submarines.The device could also be used for patients who have a pacemaker and need an MRI of a knee or other body part,so the image would not be distorted.
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