/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 16 Briefly describe the phenomenon ... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 20: Problem 16

Briefly describe the phenomenon of magnetic hysteresis, and why it occurs for ferromagnetic and ferrimagnetic materials.

Short Answer

Expert verified
Answer: Magnetic hysteresis is a phenomenon that occurs in ferromagnetic and ferrimagnetic materials, where the magnetization of the material does not follow the applied magnetic field but exhibits a loop-like behavior known as hysteresis loop. It occurs due to the nature of magnetic domains and their interactions with each other and the applied field. When a magnetic field is applied, some domain boundaries move, causing the domains to grow or shrink. However, when the field is removed, these boundaries do not immediately return to their original positions, leading to a lag between the magnetization and the applied field. This behavior is due to the energy barriers that must be overcome for the domains to change their magnetization orientation.

Step by step solution

01

Introduction to magnetic hysteresis

Magnetic hysteresis is a phenomenon that occurs in ferromagnetic and ferrimagnetic materials, where the magnetization of the material does not follow the applied magnetic field, but instead exhibits a loop-like behavior. This is known as a hysteresis loop, and it provides key information about the magnetic properties of these materials.
02

Magnetic domains

In ferromagnetic and ferrimagnetic materials, magnetic moments are aligned in small regions called magnetic domains. Within a domain, the moments are parallel to each other, resulting in a net magnetization. However, in the absence of an external magnetic field, these domains are arranged in such a way that the overall magnetization of the material is zero.
03

Response to external magnetic fields

When an external magnetic field is applied, the magnetic domains in the material begin to align with the direction of the field. As a result, the overall magnetization of the material starts to increase. If the magnetic field is strong enough, it will eventually cause all the domains to be aligned, resulting in the material being saturated.
04

Hysteresis loop

A hysteresis loop can be observed when a material undergoes a cycle of increasing and decreasing magnetic field strength. As the magnetic field is increased, the material becomes more magnetized until it reaches saturation. Once the field is decreased, the magnetization does not immediately return to zero; it follows a different path back to the starting point, creating the hysteresis loop. The size and shape of the hysteresis loop can provide insight into the properties of the material, such as the ease with which it can be magnetized and demagnetized.
05

Causes of magnetic hysteresis

Magnetic hysteresis occurs due to the nature of magnetic domains and their interactions with each other and the applied field. When a magnetic field is applied, some of the domain boundaries move, causing the domains to grow or shrink. However, when the field is removed, these boundaries do not immediately return to their original positions. This behavior is due to the energy barriers that must be overcome for the domains to change their magnetization orientation, which causes the lag between the magnetization and the applied field.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Estimate saturation values of \(H\) for singlecrystal iron in [100], [110], and [111] directions.

The magnetization within a bar of some metal alloy is \(3.2 \times 10^{5} \mathrm{~A} / \mathrm{m}\) at an \(H\) field of \(50 \mathrm{~A} / \mathrm{m}\). Compute the following: (a) the magnetic susceptibility, (b) the permeability, and (c) the magnetic flux density within this material. (d) What type(s) of magnetism would you suggest as being displayed by this material? Why?

Cite the differences between type I and type II superconductors.

The chemical formula for manganese ferrite may be written as \(\left(\mathrm{MnFe}_{2} \mathrm{O}_{4}\right)_{8}\) because there are eight formula units per unit cell. If this material has a saturation magnetization of \(5.6 \times 10^{5} \mathrm{~A} / \mathrm{m}\) and a density of \(5.00 \mathrm{~g} / \mathrm{cm}^{3}\) estimate the number of Bohr magnetons associated with each \(\mathrm{Mn}^{2+}\) ion.

Cite the differences between hard and soft magnetic materials in terms of both hysteresis behavior and typical applications.
See all solutions

Recommended explanations on Physics Textbooks

Fundamentals of Physics

Read Explanation

Geometrical and Physical Optics

Read Explanation

Translational Dynamics

Read Explanation

Electricity

Read Explanation

Space Physics

Read Explanation

Scientific Method Physics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.