Physics for Information Science: Unit III: Magnetic Properties of Materials

Introduction of Magnetic Properties of Materials

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Magnetic materials are the materials which can be made to behave as a magnets. When these materials are kept in an external magnetic field, they will create a permanent magnetic moment in it.

UNIT – III

CHAPTER 3

MAGNETIC PROPERTIES OF MATERIALS

Introduction -Basic Definitions -Magnetic Dipole Moment -Magnetic Permeability and Susceptibility - Classification of Magnetic Materials Based on Atomic Magnetic Moments Diamagnetic Material - Paramagnetic Materials -Ferromagnetic Materials - Comparison Chart For Dia, Para and Ferro-magnetic Materials -Weiss Molecular Theory of Ferromagnetism - Curie Temperature -Spontaneous and Saturation Magnetisation -Heisenberg Interpretation on Internal Field: (Quantum Theory) - Ferromagnetic Domains -Domain Theory of Ferromagnetism - Hysteresis -M Versus H Behaviour - Explanation of Hysteresis on the Basis of Domains - Soft and Hard Magnetic Materials -Examples & Uses - Energy Product -Anti-ferromagnetism Ferrimagnetism and Ferrites -Structure of Ferrites - Magnetic Moment of a Ferrite Molecule -Applications of Ferrites -Magnetic Principle in Computer Data Storage -Magnetic Storage Devices -Magnetic Tape - Magnetic Hard Disk - Magnetic Bubble Memories - Magnetic Hard Disk Drive [HDD] With Gmr Sensor.

INTRODUCTION

Magnetic materials are the materials which can be made to behave as a magnets. When these materials are kept in an external magnetic field, they will create a permanent magnetic moment in it. There are nearly eleven types of magnetic materials. Some of them are diamagnetic, paramagnetic, ferromagnetic, antiferromagnetic and ferrimagnetic.

Magnetism originates from the magnetic moment of the magnetic materials due to the rotational motion of the charged particles. When an electron revolves around the positive nucleus, orbital magnetic moment arises and due to the spinning of electrons, spin magnetic moment arises. Let us see some of the basic definitions in magnetism.

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Home | Department: CSE Department | Ist Year | Subject: Physics for Information Science |

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Physics for Information Science: Unit III: Magnetic Properties of Materials

Introduction of Magnetic Properties of Materials

Basic Definitions - Magnetic Dipole Moment

Magnetic Permeability and Susceptibility

Classification of Magnetic Materials Based on Atomic Magnetic Moments

Diamagnetic Material - Properties, Effect of external field, Examples

Paramagnetic Materials - Properties, Effect of external field, Examples

Ferromagnetic Materials - Properties, Effect of external field, Examples

Comparison Chart for Dia, Para and Ferro-Magnetic Materials

Weiss Molecular Theory of Ferromagnetism Curie Temperature

Spontaneous and Saturation Magnetisation

Heisenberg Interpretation on Internal Field: (Quantum Theory) - Magnetic Properties of Materials

Ferromagnetic Domains

Domain Theory of Ferromagnetism

Hysteresis - M Versus H Behaviour - Magnetic Properties of Materials

Explanation of Hysteresis on the Basis of Domains

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