Curie Law For Paramegnatization

2. T
oday our presentation
T
opic is
Curie Law For Paramegnatization

4. Paramegnatism materials
 Paramagnetism is the result of intrinsic magnetic moment.
 Some atoms and ions do possess permanent magnetic moment.
In the absence of the external field the moment are randomly oriented with
respect to the one another due to the thermal fluctuations therefore substance
exhibit no net magnetic moment

5.  When placed in magnetic field, moment tends to align along the direction of the field producing a net
magnetization. when the atoms and ions are acted upon individually with mutual interaction between
them the effect is called paramagnetism
 The moment a line up in the direction of the field which help to enhance the external
field.Paramagnetic susceptibility is greater than the zero.Due to small paramagnetic susceptibility to
the paramagnetic substance weakly attract the line of force

6. Examples
And rare earth Elements Alkali and Alkline earth metals.
Manganise
Alumium,
Platinum,

7. Curie’s Law
Curie Law is a law in magnetization that establishes a relation between the magnetic susceptibility and the
magnetisation of a paramagnetic material.A paramagnetic material is a metal that is weakly attracted to
magnets.
 The relation was experimentally discovered by a French physicist,
Pierre Curie.
Statement of Curie Law:
 “The magnetization of a paramagnetic material is directly proportional to an applied magnetic field and
inversely proportional to temperature, for large temperatures, weak magnetic fields.

8. Curie Law Formula
𝑀 = 𝜒𝐻 , with
𝜒 =
𝐶
𝑇
 Wherein,
𝜒 > 0 – Magnetic Susceptibility,
M – Magnitude of magnetization(A/m),
H – Magnitude of the applied magnetic field(A/m),
T – Absolute temperature(K),
C – Material specific Curie constant(k)
Al +2.1x10-6
Ca +1.9x10-5
O+ +2.3x105
Cu -9.8x10-6
Hg -2.9x10-5
N -5.0x10-9

9.  Cuirie Law for paramagnetization of paramegnatic substance is directely proportional to external
megnatic field.
 Paramegnatic material obey curie law because as temperature increases the individual atomic
magnetic moments of material are randonmized.
 This reduces the intensity of megnatization and suscepability.

10. Limitations
The formula or the relation holds only for high temperatures or weak magnetic fields
Only valid for paramegantic materials
The ferromagnetic substance do not obey Curie's law