Material Permeability & Magnetization: High-Field Induction

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In summary, the conversation is about the search for materials with high magnetic permeability that do not significantly increase the external field. The person also asks about materials that require high fields to induce their own strong fields. The conversation also mentions a material called Mumetal which has an induction range of 1 to 300 at a few Gauss and is suitable for their "secret weapon" plans. The conversation also includes some humorous banter.
  • #1
drag
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Greetings !

I was wondering if there are materials that have
high magnetic permeability, yet aren't really ferromagnets -
would not considrably increase the external field ?

Alternatively, how about materials with high permeability
that need relatively high fields to induce their own strong
fields. For example, iron in magnetic field of a few Gauss will
already produce a 1 T field, so how about materials that will
need say hundreds of Gauss before they're really induced
to Tesla scale field magnitudes ?

Thanks a lot.

Live long and prosper.
 
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  • #2
hmm... some attention ? :biggrin:
 
  • #3
Could you be more specific, and restate your question in terms of B, H, M, and [tex] \mu [/tex] ?

There appears to be an apparent contradiction in the statement of your problem, but I'm going to wait till you rewrite it.
 
Last edited:
  • #4
Maybe my question was somewhat confusing.
But it's simple really - I'm looking for a material with
high permeability and low induced field. Or alternatively,
high permeability and low induced field at least when the
external field is below, say, 10^-2 T (100 Gauss).
(Low, in this case, would be say - up to 100 times
the external field at most.)

Thanks. :smile:
 
  • #5
Ah... never mind, found the numbers on one type of
Mumetal, something like 1 to 300 induction at a few Gauss,
fits my secret weapon plans... :biggrin:
 
  • #6
Hahaha,
Will anyone be spared ?
 
  • #7
Sure, those who pay up-front... :biggrin:

btw, nice to have you back BH, haven't seen you around
for some time now. :smile:
 

1. What is material permeability?

Material permeability is the ability of a material to allow a magnetic field to pass through it. It is a measure of how easily a material can be magnetized.

2. How is material permeability measured?

Material permeability is measured using a unit called Henry per meter (H/m). It is usually determined by applying a known magnetic field to the material and measuring the resulting magnetic flux density.

3. What is the relationship between material permeability and high-field induction?

Material permeability and high-field induction are directly related. As the material permeability increases, the high-field induction also increases. This means that the material becomes more easily magnetized when exposed to a magnetic field.

4. How does material permeability affect the strength of a magnetic field?

The higher the material permeability, the stronger the magnetic field will be. This is because the material is more easily magnetized, allowing for a higher concentration of magnetic field lines.

5. How does material permeability differ from material magnetization?

Material permeability refers to the ability of a material to allow a magnetic field to pass through it, while material magnetization refers to the alignment of magnetic domains within a material. Material permeability affects the strength of a magnetic field, while material magnetization affects the magnetic properties of a material.

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