The properties of negative index of refraction don't actually BLOCK the magnetic field lines, they would be bent back into space instead of into the core. That's the point of meta-materials, composites of them can have properties not found in nature by any element or combination of elements without meta structure.So...
how exactly would the meta materials be able to suppress a magnetic field.
The magnetic field may be slightly impaired if measured with sensitive enough equipment. This is a far cry from BLOCKING a magnetic field. Nothing we know of in physical or chemical or theoretical terms is capable of BLOCKING a magnetic field.
Perhaps someday, a way to create a 'mono' pole may be dreamed up and this might have some drastic affect on a normal bipolar magnetic field, but I cannot foresee anyone, ever, being able to BLOCK magnetic lines of force with any type of nano scale manufactured material. We are limited by the elements of the periodic table. Nothing can be made that does not incorporate one more elements from this list, and nothing on the "list" can BLOCK a magnetic field.
Like I said. PFM.
http://www.ce.sc.edu/deptinfo/members/faculty/ray/web1/Ugrad/ECIV%20303/Student%20Presentations/MetaMaterials.pptx
Blocking the entire worlds power grid using them would be almost PFM but it's not a total impossible premise like some anti-power tower.
My first post of the thread.
If I were writing something even remotely possible I would use the ability for meta-materials to warp the space of selected EM frequencies, shielding the objects from the energy.
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