What is remanent magnetism?

Name: Problem 6, Chapter 21: An Introduction to Physical Science
Uploaded: 2021-11-10T15:05:30-08:00
Duration: 2 min 15 s
Channel: Vishal Gupta
Description: What is remanent magnetism?

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Key Concepts

Ferromagnetism

Ferromagnetism is the fundamental property of materials that exhibit strong, permanent magnetization. In ferromagnetic materials, magnetic moments of atoms tend to align parallel to each other due to exchange interactions, making them capable of sustaining remanent magnetism even after the removal of an external magnetic field.

Magnetic Hysteresis

Magnetic hysteresis is the lag between changes in magnetization within a material and the external magnetic field applied to it. It is depicted by a hysteresis loop in a plot of magnetization versus applied field, indicating how the material’s magnetic state depends on its history of exposure to magnetic fields, and it plays a key role in the retention of remanent magnetism.

Remanent Magnetism

Remanent magnetism is the magnetization that remains in a ferromagnetic material after an external magnetic field has been removed. This phenomenon occurs because the magnetic domains within the material, which are regions where magnetic moments are aligned, can remain oriented even in the absence of an applied field, thereby retaining some magnetization.

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