Q. 43.8( 9 Votes )

Which of the following arrangements shows schematic alignment of magnetic moments of antiferromagnetic substances?
A.

B.

C.

D.

Answer :

Antiferromagnetism is the case where the magnetic moment of the atoms or molecules occur in accordance with spins of their electrons (usually in low temperatures) align themselves with a regular pattern with the neighbouring spins oriented in opposite directions cancelling each other’s magnetic moments which is option (iv) .


Options (i) and


(ii) are simply the case for ferromagnetism when the substance is placed in a magnetic field the domains (substance particles grouped in different regions) orient themselves in the direction of the magnetic field which results in strong magnetism.


Option (iii) is clearly the case of ferrimagnetism where the domains (tiny magnets) are aligned in parallel and anti-parallel orientation in unequal numbers which result in very weak magnetism.

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