Materials Science and Engineering: An Introduction

Published by Wiley
ISBN 10: 1118324579
ISBN 13: 978-1-11832-457-8

Chapter 20 - Magnetic Properties - Questions and Problems - Page 836: 20.24

Answer

In terms of hysteresis behavior: A hard magnetic material has a high remanence, a high coercivity, a high saturation flux density, high hysteresis energy losses and a low initial permeability. A soft magnetic material has a high initial permeability, a low coercivity, and low hysteresis energy losses. In terms of applications: Hard magnetic materials are utilized for permanent magnets. Soft magnetic materials are used in devices that are subjected to alternating magnetic fields such as transformer cores, generators, motors, and magnetic amplifier devices.

Work Step by Step

In terms of hysteresis behavior: A hard magnetic material has a high remanence, a high coercivity, a high saturation flux density, high hysteresis energy losses and a low initial permeability. A soft magnetic material has a high initial permeability, a low coercivity, and low hysteresis energy losses. In terms of applications: Hard magnetic materials are utilized for permanent magnets. Soft magnetic materials are used in devices that are subjected to alternating magnetic fields such as transformer cores, generators, motors, and magnetic amplifier devices.
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