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प्रश्न
Explain the following with suitable examples: Ferrimagnetism
उत्तर
Ferrimagnetism: The substances in which the magnetic moments of the domains are aligned in parallel and anti-parallel directions, in unequal numbers, are said to have ferrimagnetism. Examples include Fe3O4 (magnetite), ferrites such as MgFe2O4 and ZnFe2O4.
Ferrimagnetic substances are weakly attracted by a magnetic field as compared to ferromagnetic substances. On heating, these substances become paramagnetic.
Schematic alignment of magnetic moments in ferrimagnetic substances
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संबंधित प्रश्न
Iron (z=26) is highly ferromagnetic. Explain.
What type of magnetism is shown by a substance if magnetic moments of domains are arranged in same direction?
Explain the following with suitable examples: Paramagnetism
Explain the following with suitable examples: Antiferromagnetism
What happens to the domains in a ferromagnetic material in the presence of external magnetic field?
Example of ferromagnetic substance is ____________.
When heated to high temperature, ferromagnetic substance changes to ____________.
Which type of substances would make better permanent magnets?
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Reason: The electrons change their spin on heating.
Fe3O4 (magnetite) is an example of ___________.
Which one of the following would feel attraction when placed in magnetic field: Co2+, Ag+, Ti4+, Zn2+
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- 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.
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[permeability of the free space μ0 = 4π × 10-7 Wb/A - m]
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Give a reason for the following:
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