Magnetic Susceptibility Unit

Introduction to Magnetic Susceptibility unit:
Magnetic susceptibility is a property of any magnetic specimen which determines, how easily and how fast a specimen can be magnetized if it is placed inside a uniform magnetic field. Qualitatively, susceptibility of a magnetic material is defined as the ratio of the intensity of magnetization (I) induced in the material to the magnetizing force (H) applied. Susceptibility is represented as ?m thus

?m = I / H

Since the definition of the susceptibility contains the magnetic moment per unit volume (I) thus ?m is usually called volume susceptibility of the material.

I like to share this Electric and Magnetic Fields with you all through my article.

Values of Magnetic Susceptibility


The value of the magnetic susceptibility determines the type of the magnetic material, if the magnetic susceptibility of any material has a negative value and it is independent of the temperature then the material is a diamagnetic material and if the magnetic susceptibility is positive and proportional inversely to the temperature of the substance then the material is a paramagnetic substance but the value of the magnetic susceptibility is less than one in both cases. The substances which are magnetic must possess a positive value of the magnetic susceptibility.

Is this topic Inverse Square Law Problems hard for you? Watch out for my coming posts.

Unit of Magnetic Susceptibility for various elements

As discussed above the magnetic susceptibility is the ratio of the intensity of magnetization and the magnetization force and they both has same unit equal to the ampere per meter (A m-1) thus magnetic susceptibility has no units but its value determines the nature of the magnetic substance. the magnetic susceptibility of some paramagnetic and diamagnetic substance is given below:

Paramagnetic substances:

Aluminium (Al)                                               0.82
Iron Aluminium alloy                                       38.2
Calcium (Ca)                                                  1.4
Chromium (Cr)                                                4.5
Cuprous oxide (CuO)                                       1.5
Ferric oxide (Fe2O3)                                        26.0
Magnesium (Mg)                                             0.69
Manganese (Mn)                                             1
Platinum (Pt)                                                  1.65
Tantalum (Ta)                                                 1.1
Diamagnetic substance:

Bismuth (Bi)                                                   -1.7
Cadmium (Cd)                                                -0.23
Copper (Cu)                                                    -0.11
Diamond                                                         -0.62
Germanium (Ge)                                              -0.15
Gold (Au)                                                        -0.19
Helium (He)                                                     -0.59
Lead (Pb)                                                        -0.18
Silver (Ag)                                                       -0.25