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प्रश्न
What is the difference between ferromagnetic and ferrimagnetic substances?
अंतर स्पष्ट करें
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उत्तर
| Ferromagnetic substances | Ferrimagnetic substances | |
| 1. | These substances are strongly attracted by magnetic fields and show permanent magnetism even in the absence of a magnetic field. | The substances which possess only small net magnetic moments in spite of the presence of a large number of unpaired electrons are called ferrimagnetic substances. |
| 2. | Ferromagnetism is due to the spontaneous alignment of magnetic moments (due to the presence of unpaired electrons) in the same direction. | In a ferrimagnetic substance, the moments are aligned in parallel and antiparallel directions in unequal numbers, resulting in a small net magnetic moment. |
| 3. | Magnetic strength is very strong magnetism. | Magnetic strength is moderate magnetism. |
| 4. | Domain structures are aligned uniformly. | Domain structures are oppositely aligned but unequal. |
| 5. | For example, Iron, cobalt, nickel, CrO2, etc. | For example, Fe3O4, ferrites, etc. |
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