Antiferromagnetic substance possess:

Options

A. Low magnetic moment
B. Large magnetic moment
C. Zero magnetic moment
D. Non-zero value of magnetic moment

Answer

To solve the question regarding the properties of antiferromagnetic substances, we will follow these steps:

### Step 1: Define Antiferromagnetic Substances
Antiferromagnetic substances are materials in which the magnetic moments of atoms or ions align in opposite directions, resulting in a cancellation of the overall magnetic moment.

**Hint:** Remember that in antiferromagnetic materials, the alignment of magnetic moments is crucial to understanding their properties.

### Step 2: Understand Magnetic Moment
The magnetic moment is a vector quantity that represents the magnetic strength and orientation of a magnet or magnetic material. In antiferromagnetic substances, the opposing alignments lead to specific characteristics.

**Hint:** Consider how the arrangement of magnetic moments affects the overall magnetism of the material.

### Step 3: Analyze the Alignment of Magnetic Moments
In antiferromagnetic materials, the magnetic moments of adjacent atoms or ions align in opposite directions (anti-parallel). This leads to a situation where the magnetic moments cancel each other out.

**Hint:** Visualize how two opposing arrows (representing magnetic moments) can cancel each other out.

### Step 4: Conclusion on Magnetic Moment
Due to the anti-parallel alignment of the magnetic moments in antiferromagnetic substances, the net magnetic moment of the entire material is effectively zero.

**Hint:** Think about what happens when you add vectors that point in opposite directions.

### Final Answer
Antiferromagnetic substances possess a net magnetic moment of zero due to the anti-parallel alignment of their magnetic moments.

**Correct Option:** The third option is correct, indicating that the magnetic moment of antiferromagnetic substances is zero.