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प्रश्न
Give reasons:Ferrimagnetic substances show better magnetism than antiferromagnetic substances.
Why do ferrimagnetic substances show better magnetism than antiferromagnetic substances?
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उत्तर १
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.
उत्तर २
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.
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संबंधित प्रश्न
What type of magnetism is shown in the following alignment of magnetic moments?
Explain why:
(i) Transition elements form coloured compounds.
(ii) Interhalogen compounds are more reactive than their constituent elements.
(iii) Cu+ is diamagnetic but Cu2+ is paramagnetic. (Z = 29)
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Sulphur in vapour state shows paramagnetic behaviour.
When heated to high temperature, ferromagnetic substance changes to ____________.
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(i) get oriented in the direction of the applied magnetic field.
(ii) get oriented opposite to the direction of the applied magnetic field.
(iii) are oppositely oriented with respect to each other without the application of magnetic field.
(iv) cancel out each other’s magnetic moment.
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- Electric monopoles do not exist whereas magnetic monopoles exist.
- Magnetic field lines due to a solenoid at its ends and outside cannot be completely straight and confined.
- Magnetic field lines are completely confined within a toroid.
- Magnetic field lines inside a bar magnet are not parallel.
- χ = -1 is the condition for a perfect diamagnetic material, where x is its magnetic susceptibility.
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(Atomic number of Fe = 26, Cu = 29, Co = 27 and Ni = 28)
