[SI-LIST] Re: Digest Number 896
- From: "Thomas Beneken" <beneken@xxxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Fri, 7 Nov 2003 11:24:24 +0100
Mark,
Cu diamagnetic 1-10^-9
Au diamagnetic 1-28^-9
W ferromagnetic 1+67^-6
Ni ferromagnetic 600 Number changes for thin coatings!
No numbers for Mo at hand. Hope it helps.
Thomas
> -----Original Message-----
>
> Message: 7
> Date: Thu, 6 Nov 2003 17:11:23 -0000
> From: "WALKER, Mark" <mark.walker@xxxxxxxxxxxxxxxx>
> Subject: relative magnetic permeability of tungsten,
> molybdenum... proving hard to find
>
>
> All, can you help me out with the relative magnetic
> permeability of a few
> conductors?
>
> I've spent most of the afternoon using google and searching
> through the
> numerous engineering, physics & chemistry handbooks in our
> library, all to
> no avail. I'm looking at materials used for MCM conductors
> plus a few others
> for comparison, with a view to analysing the effects on
> multi-gigabit serial
> link type signals.
>
> Ideally, I'd like to complete the following list for relative magnetic
> permeability, Ur:
>
> copper, Ur = 1.
> gold
> molybdenum
> tungsten
> nickel, Ur in the range 5 to 20 (assume 10) at 1 GHz (see
> Johnson & Graham,
> black magic 2, p267).
>
> However, even if such figures are forthcoming, are they close
> enough to the
> paste like compounds used for MCM conductors?
>
> Cheers,
> Mark.
>
> Stevenage,
> England.
>
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