Which is NOT a property of ferrimagnetism?

These substances lose ferrimagnetism on heating.

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Magnetic moments of the domains in the substance are aligned in parallel and anti-parallel directions in unequal numbers.

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The domains are oppositely oriented and cancel out each other's magnetic moment.

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These substances are attracted very strongly by a magnetic field.

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Solution

The correct option is B
Magnetic moments of the domains in the substance are aligned in parallel and anti-parallel directions in unequal numbers.

Ferrimagnetism is observed when the magnetic moments of the domains in the substance are aligned in parallel and anti-parallel directions in unequal numbers. They are weakly attracted by magnetic field as compared to ferromagnetic substances. Fe₃O₄ (magnetite) and ferrites like MgFe₂O₄ and ZnFe₂O₄ are examples of such substances.

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Similar questions

Q. Assertion :Substances like

F e_{3} O_{4}

and

M g F e_{2} O_{4}

lose ferrimagnetism on heating and become paramagnetic. Reason: Magnetic moments of the domains in these substances are aligned in parallel and antiparallel directions in unequal numbers.

Which of the following statements are correct ?

(a) Ferrimagnetic substances lose ferrimagnetism on heating and become paramagnetic

(b) Ferrimagnetic substances do not lose ferrimagnetism on heating and remain ferrimagnetic

(c) Antiferromagnetic substances have domain structures similar to ferromagnetic substances and their magnetic moments are not cancelled by each other

(d) In ferromagnetic substances, all the domains get oriented in the direction of magnetic filed and remain as such even after removing magnetic field

Which of the following statements is not true?

(a) Paramagnetic substances are weakly attracted by magnetic field

(b) Ferromagnetic substances cannot be magnetised permanently

(d) Pairing of electrons cancels their magnetic moment in the diamagnetic substances

The value of magnetic moment is zero in the case of antiferromagnetic substances because the domains ...........

(a) get oriented in the direction of the applied magnetic fiels

(b) get oriented opposite to the direction of the applied magnetic fiels

(d) cancel out each other's magnetic moment

Q. Ferrimagnetic is observed when the magnetic moments of the domains in the substance are ?

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