How Do You Classify Materials Based on Magnetic Susceptibility?

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SUMMARY

This discussion focuses on classifying materials based on their magnetic susceptibility (χ). Ferromagnetic materials, such as cold rolled steel (χ = 2250) and Monimax (χ = 669), exhibit high susceptibility and permeability (u >> 1). Paramagnetic materials, including liquid oxygen (χ = 3.9E-4) and manganese (χ = 1.0E-6), have positive susceptibility but lower permeability (u > 1). Diamagnetic materials, like ice (χ = -8.1E-6) and helium (χ = -0.58E-6), show negative susceptibility and permeability (u < 1). The discussion also highlights the need for verification regarding chromium's antiferromagnetic properties and manganese's classification as non-magnetic.

PREREQUISITES
  • Understanding of magnetic susceptibility and its significance
  • Familiarity with material classifications: ferromagnetic, paramagnetic, and diamagnetic
  • Knowledge of permeability in magnetic materials
  • Basic principles of superconductivity and its relation to magnetic properties
NEXT STEPS
  • Research the properties of antiferromagnetic materials and their classification
  • Explore the concept of superconductivity and its implications for materials like helium
  • Study the differences between ferromagnetic and paramagnetic materials in detail
  • Investigate the effects of temperature on magnetic susceptibility in various materials
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Materials scientists, physicists, and engineers involved in material classification and magnetic property analysis will benefit from this discussion.

Max Eilerson
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Hi,

I'm just given the magnetic susceptibiliy of materails [tex]\chi[/tex], for which I'm supposed to identify what class of magnetic materail they belong too. Some basic rules are listed in the notes.

Ferromagnets [tex]\chi > 0, u >> 1[/tex]

cold rolled steel 2250
Monimax 669


Paramagnets [tex]\chi > 0, u > 1[/tex]

Oxygen (liquid at -219 C) 3.9E-4
Manganese 1.0E-6
Chorium 4.5E-6

Diamagnet ([tex]\chi < 0, u < 1[/tex]

Ice - 8.1E-6 (I know ice XI is ferrielectric)
Helium - 0.58E-6

However I looked on wiki and it appears Chormium is antiferromagnetic and manganese is non-magnetic. I'm fairly sure sure helium is a superconductor. This is question 1, on an easy work sheet so I'm not sure what to answer.
 
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From the values you have provided, it looks like cold rolled steel and Monimax are ferromagnets, Oxygen is a paramagnet, Ice is a diamagnet, and Helium is a superconductor. However, since you have noted that Chrome is antiferromagnetic and Manganese is non-magnetic, it would be best to double check with other sources before making your final decision.
 

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