Advertisements
Advertisements
Questions
Give reasons:Ferrimagnetic substances show better magnetism than antiferromagnetic substances.
Why do ferrimagnetic substances show better magnetism than antiferromagnetic substances?
Solution 1
In the presence of magnetic field, the magnetic moments of domains of an antiferromagnetic substances are ordered in such a way half of the magnetic moments are aligned in one direction while the remaining half are in opposite direction. As a result of it net magnetic moment will be zero whereas in case of ferrimagnetic substances the magnetic moments of the domains of ferrimagnetic substances are aligned in parallel and anti-parallel directions in unequal numbers. As a result, there will be small value of magnetic moment for ferrimagnetic substances.
Solution 2
Anti-ferromagnetism have domain structures that are oppositely oriented and cancel out each other's magnetic moment while in ferrimagnetism the magnetic moments of the domains in the substance are aligned in parallel and anti-parallel directions in unequal numbers resulting net dipole moment. Hence, ferrimagnetic substances show better magnetism than antiferromagnetic substances.
APPEARS IN
RELATED QUESTIONS
Write the type of magnetism observed when the magnetic moments are oppositely aligned and cancel out each other.
Pyrolusite ore is _______.
Give reason for the following :
Sulphur in vapour state shows paramagnetic behaviour.
When heated to high temperature, ferromagnetic substance changes to ____________.
Fe3O4 is ____________.
Which type of substances would make better permanent magnets?
Which of the following statements is not true?
Which one of the following pairs has only paramagnetic species?
Given below are two statements labelled as Assertion (A) and Reason (R).
Assertion: Magnetic moment values of actinides are lesser than the theoretically predicted values.
Reason: Actinide elements are strongly paramagnetic.
Select the most appropriate answer from the options given below:
The susceptibility of a paramagnetic material is 99. The permeability of the material in Wb/A-m is ______.
[permeability of the free space μ0 = 4π × 10-7 Wb/A - m]
