The material I am working on is molybdenum permalloy. According to published literature, this alloy possesses a magnetic permeability between 8,000 and 120,000. Nevertheless, when I calculated the magnetic permeability of my sample, it equaled 35, which is completely different from what is reported in the literature. My VSM results are expressed in the Gaussian system (emu/g-G) and I converted them to the SI system (Tesla-A/m). Below is a figure that shows how I converted the magnetic units.
Are there any problems with my magnetic unit conversion? Or would this difference result from the effect of processing techniques on my sample's magnetic permeability?
I would appreciate any response.
Dear Parisa Moosavi,
I dont know how exactly you calculate permeability but maybe some of my thougths will be useful for you
In my opinion by dividing B on H you get absolute permeability but in literature authors gives relative permeability.
mu(relative)=mu(absolute)/permeability of free space.
Dear Rafael Shakirzyanov,
I appreciate your answer.
In fact, I calculated the relative magnetic permeability. For this purpose, I divided the slope of the initial magnetization curve in the linear zone by the permeability of free space (μ0), and the result was 35.
Dear Parisa Moosavi ,
The procedure for converting magnetic units from the Gaussian to the SI system involves multiplying the Gaussian unit value by a conversion factor.
To convert magnetic units from the Gaussian system to the SI system, you can use the following formula:
1 Gauss = 10^-4 Tesla
1 emu/cm^3 = 10^3 A/m
Therefore, to convert from Gauss to A/m, you can use the following formula:
Magnetic field strength (A/m) = Magnetic field strength (Gauss) x (10^-4 / 10^3)
Simplifying the formula, we get:
Magnetic field strength (A/m) = Magnetic field strength (Gauss) x 10^-7
So, to convert a magnetic field strength value in Gauss to A/m, simply multiply the Gauss value by 10^-7.
Also, to convert from emu/g-G to Tesla-A/m, you can use the following formula:
Magnetic flux density (Tesla-A/m) = Magnetic flux density (emu/g-G) x (10^-3/4π)
where 4π = 10^-7 H/m (Henry per meter) is a conversion factor between electromagnetic units and magnetic fields.
Alternatively, you can use the following formula:
Magnetic flux density (Tesla-A/m) = Magnetic flux density (Gauss) x 10^-4 x 10^3 / (4π)
where 10^-4 is a conversion factor from Gauss to Tesla, and 10^3 is a conversion factor from emu/g to A.s^2/m^2.
Regards,
KP
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