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Paramagnetism

Paramagnetism is a kind of magnetism where several objects are attracted through an externally applied magnetic field. Whereas the diamagnetic materials are repelled by magnetic fields and develop induced magnetic fields in the direction which is opposite to that of the applied magnetic fields.

What is Paramagnetism?

The paramagnetic material becomes a good magnetic material when placed in the strong magnetic material. It acts as a magnet which attracts and repels other magnetic and ferromagnetic materials. When the magnetic field is removed, the total magnetic alignment of the magnetic dipoles is lost and the dipole is returned to its normal random motion. This condition is known as Paramagnetism.

These materials include most of the chemical elements and some compounds as they have a magnetic permeability greater than or equal to 1. The magnetic moment induced by the applied field is linear to the strength and weakness of the field. It usually needs a sensitive analytical balance to detect the effect and different modern measurements on paramagnetic materials that are often conducted with a SQUID magnetometer.

Super Paramagnetism

Super Paramagnetism is described as the property as some materials magnetic moments change their direction at the nanoscale and behave like a paramagnet event. According to Curie’s law, If there is no magnetic field applied, curie temperature is applied at the same time as they show high magnetic susceptibility.

The video about the fundamentals of magnetism

Curie’s Law

According to this law, the magnetization in the paramagnetic material is inversely proportional to the temperature, which means the more the temperature of the paramagnetic material increases, its magnetization decreases.

M = C(B/T)

Where,

C = Curie constant

T = temperature in Kelvin and

B = applied magnetic field

Frequently Asked Questions – FAQs

State Curie’s law?

Curie’s Law states that the magnetisation in a paramagnetic substance is directly proportional to the exerted magnetic field.

Give the Curie’s law formula.

The Curie’s law formula is given by:
M = C x (B/T)
Wherein,
M = Magnetism
B = Magnetic field(in Tesla)
T = absolute temperature (in Kelvin)
C = Curie constant

State true or false: Curie’s law does not hold good for high temperatures.

FALSE. Curie’s law holds good for high temperatures.

Nickel is ferromagnetic or paramagnetic material?

Nickel is a ferromagnetic material.

Define Curie temperature.

It is the temperature at which a ferromagnetic material turns to paramagnetic on heating.

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