Ferromagnetic Substance vs. Paramagnetic Substance

Attribute	Ferromagnetic Substance	Paramagnetic Substance
Response to external magnetic field	Strongly attracted	Weakly attracted
Permanent magnetization	Retains magnetization	Does not retain magnetization
Curie temperature	Above Curie temperature, loses magnetization	Above Curie temperature, loses magnetization
Domains	Has aligned magnetic domains	Has randomly oriented magnetic domains

Ferromagnetic Substance

Ferromagnetic substances are materials that exhibit strong magnetic properties. These materials are characterized by having a high magnetic susceptibility, meaning they can be easily magnetized when exposed to an external magnetic field. Examples of ferromagnetic substances include iron, nickel, and cobalt. One of the key attributes of ferromagnetic substances is their ability to retain magnetization even after the external magnetic field is removed.

Another important characteristic of ferromagnetic substances is their ability to form magnetic domains. These domains are regions within the material where the magnetic moments of the atoms are aligned in the same direction. When a ferromagnetic substance is magnetized, these domains align to create a strong overall magnetic field. This alignment is what allows ferromagnetic materials to exhibit such strong magnetic properties.

Ferromagnetic substances also exhibit a phenomenon known as hysteresis. Hysteresis is the tendency of a material to retain some magnetization even after the external magnetic field has been removed. This means that ferromagnetic materials can "remember" past magnetization states, which can be useful in applications such as magnetic storage devices.

Paramagnetic Substance

Paramagnetic substances, on the other hand, are materials that exhibit weak magnetic properties. These materials have a low magnetic susceptibility, meaning they are not easily magnetized by an external magnetic field. Examples of paramagnetic substances include aluminum, platinum, and oxygen. Unlike ferromagnetic substances, paramagnetic materials do not retain magnetization once the external magnetic field is removed.

One of the key attributes of paramagnetic substances is their ability to become magnetized in the presence of an external magnetic field. When a paramagnetic material is exposed to a magnetic field, the magnetic moments of the atoms align with the field, creating a weak overall magnetic effect. However, once the external field is removed, the material loses its magnetization.

Paramagnetic substances do not exhibit the formation of magnetic domains like ferromagnetic materials. Instead, the magnetic moments of the atoms in a paramagnetic material align only in the presence of an external magnetic field. This lack of domain formation is what contributes to the weak magnetic properties of paramagnetic substances.

Comparison

• Ferromagnetic substances exhibit strong magnetic properties, while paramagnetic substances have weak magnetic properties.
• Ferromagnetic materials can retain magnetization even after the external magnetic field is removed, whereas paramagnetic materials lose their magnetization once the field is removed.
• Ferromagnetic substances form magnetic domains, while paramagnetic substances do not exhibit domain formation.
• Ferromagnetic materials exhibit hysteresis, while paramagnetic materials do not show this phenomenon.
• Examples of ferromagnetic substances include iron, nickel, and cobalt, while examples of paramagnetic substances include aluminum, platinum, and oxygen.

In conclusion, ferromagnetic and paramagnetic substances exhibit distinct magnetic properties due to differences in their atomic structure and behavior in the presence of an external magnetic field. Understanding these differences is crucial for various applications in technology, such as magnetic storage devices, sensors, and magnetic materials research.