In a feromagnetic material, below the curie temperature, a domain is defined as: 

  1. a macroscopic region with zero magnetization.
  2. a macroscopic region with saturation magnetization.
  3. a macroscopic region with randomly oriented magnetic dipoles. 
  4. a macroscopic region with consecutive magnetic dipoles oriented in opposite direction. 

Answer (Detailed Solution Below)

Option 2 : a macroscopic region with saturation magnetization.
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Detailed Solution

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CONCEPT:

  • Ferromagnetic material - Ferromagnetic material is defined as the material which is having a permanent magnetic moment. These materials exhibit a spontaneous net magnetization at the atomic level in the absence of an external magnetic field.
  • Curie temperature - The curie temperature is defined as the temperature at which it is a certain or sharp change in the magnetic properties.

 

EXPLANATION: 

A ferromagnetic material is the material which is having a permanent magnetic moment when we remove the magnetic field therefore below the curie temperature, a domain is defined as a macroscopic region with saturation magnetization.

The permanent magnetic momentum is shown below;

F2 Savita Teaching 1-7-24 D53

Hence, option 2) is the correct answer.

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