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Low Permeable Materials

Low Permeable Materials

Low Permeable Materials

(OP)
Hi, I am looking for a low permeable materials (MuR<20) & a supplier of thin rods made from such a material. The story is that it's supposed to work in a cryogenic environment, so ferrites seem not to be the best choice (not sure about, rather suspisious).
Please, advise if somebody knows where to look for.

RE: Low Permeable Materials

Are you looking for low perm materials or "zero" perm materials?

RE: Low Permeable Materials

(OP)
Thanks for reply. Permeability is in the range 10<MrU<20 @ 60 Hz.

RE: Low Permeable Materials

there are a variety of powders that meet your spec but may have to be encapsulated to permit use in UHV and cryo temps.

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