Module 6: Magnetic Ceramics
  Introduction
 

 

Magnetic ceramics are important materials for a variety of applications such data storage, tunnel junctions, spin valves, high frequency applications etc. These materials possess extra-ordinary properties such as strong magnetic coupling, low loss characteristics and high electrical resistivity which is often related to their structure and composition. Depending upon the type of application, based on the knowledge of materials, one can choose appropriate material.

To build an understanding, in the following sections, we will first have a brief look at the basics of magnetic properties, followed by various types of magnetism in materials and key characteristics and differences. This will be followed by a discussion on magnetic ceramics with emphasis on some of the key applications.

The Module contains:

Magnetic Moments

Macroscopic View of Magnetization

Classification of Magnetism

Diamagnetism

Paramagnetism

Ferromagnetism

Antiferromagnetic Materials

Ferrimagnetic Materials

A Comparison

Magnetic Losses and Frequency Dependence

Magnetic Ferrites

Summary

 

Suggested Reading:

  • Principles of Electronic Ceramics, by L. L. Hench and J. K. West, Wiley

  • Electroceramics: Materials, Properties, Applications, by A. J. Moulson and J. M. Herbert, Wiley