Difference between the soft magnets and hard magnets
- In comparison to hard magnets, soft magnets magnetise and demagnetizes readily.
- The retentivity of soft magnets is higher than that of hard magnets.
- Hard magnets have a coercivity that is higher than that of soft magnets.
- Soft magnets lose less energy than hard magnets due to their tiny surface area.
- In the case of soft magnets, the loop area is less than that of hard magnets.
- Soft magnets have higher magnetic permeability than hard magnets.
- In soft magnets, I and χ are both high, but in hard magnets, they are both low.
- Soft magnets are temporary magnets while hard magnets are permanent magnets.
- Ferrous-nickel alloy, Ferrites, etc. are examples of soft magnets while carbon steel, steel, tungsten, chromium steel, etc. are examples of hard magnets.
Hysteresis Loop
Hysteresis Loop– In a system with a magnetic field, hysteresis occurs. Ferromagnetic materials have a common characteristic called hysteresis. The hysteresis effect is a phenomenon that occurs when the magnetization of ferromagnetic materials lags behind the magnetic field. The word hysteresis means “lagging.” Magnetic flux density (B) lags after magnetic field strength, resulting in hysteresis (H).
Hysteresis is a property of all ferromagnetic materials. Let’s look at an example where a ferromagnetic material is placed within a current-carrying coil to better grasp the notion. The material becomes magnetized as a result of the magnetic field present. Hysteresis is known as the process of demagnetizing a material by reversing the direction of the current.
Table of Content
- Hysteresis Loop
- Difference between the soft magnets and hard magnets
- Magnetization and Demagnetization
- Sample Problems