Write three points of differences between para, dia-and ferro- magnetic materials, giving one example for each.

Magnetic materials can be classified based on their magnetic properties. Here are three key differences between paramagnetic, diamagnetic, and ferromagnetic materials, along with examples for each.

Magnetic Behavior

Paramagnetic materials have unpaired electrons that align with an external magnetic field, enhancing the field's strength. In contrast, diamagnetic materials have all paired electrons, causing them to be weakly repelled by a magnetic field. Ferromagnetic materials possess a strong magnetic response due to the alignment of their magnetic moments even without an external field.

Temperature Dependence

Paramagnetic materials exhibit magnetic properties only at higher temperatures, while diamagnetic materials remain unaffected by temperature changes. Ferromagnetic materials can lose their magnetism at high temperatures, a phenomenon known as the Curie point.

Examples

• Paramagnetic: Aluminum
• Diamagnetic: Bismuth
• Ferromagnetic: Iron

Understanding these differences helps in selecting materials for various applications in technology and industry.