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Course Co-ordinated by IIT Guwahati
Coordinators
 
Prof. S. Ravi
IIT Guwahati

 

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History and overview of spin electronics; Classes of magnetic materials; The early history of spin; Quantum Mechanics of spin; The Bloch sphere; Spin-orbit interaction.

Exchange interaction; Spin relaxation mechanisms; spin relaxation in a quantum dots; The spin Galvanic effect; Basic electron transport; Spin-dependent transport; Spin dependent tunneling; Andreev Reflection at ferromagnet and Superconductor interfaces; Spintransfer torques; Spin-transfer drive magnetic dynamics.

Current-driven switching of magnetization and domain wall motion. Domain wall scattering and Current-Induced switching in ferromagnetic wires; Spin injection, spin accumulation, and spin current, Spin hall effect, Silicon based spin electronic devices, Spin LEDs: Fundamental and applications;

Spin photoelectronic devices based on Heusler alloy, Electron spin filtering, Materials for spin electronics, Nanostructures for spin electronics, Deposition techniques, micro and nanofabrication techniques, Spin-Valve and spin-tunneling devices: Read Heads, MRAMS, Field Sensors, Spintronic Biosensors, Spin transistors, Quantum Computing with spins.

 

Modules

Topics and Contents

No. of Lectures

1

Types of magnetic materials and their characteristic features :
A brief introduction to origin of magnetism, magnetic units, different types of magnetic materials such as dia-, para-, ferro-, antiferro-magnetism etc.

5

2

Magnetic domains and hysteresis loops:
Demagnetization effects, magneto-static, magnetic anisotropy and exchange energies. Magnetostriction and magnetoelastic energy.

4

3

Magnetic measurements:
Mutual inductance bridge method, Faraday balance, vibrating sample magnetometer, torque magnetometer, SQUID magnetometer, calibration techniques.

4

4

Magnetism in elements, alloys and compounds, thin films, multilayer, amorphous and nanocrystalline materials.

5

5

Soft and hard magnetic materials:
Preparation and their properties.

3

6

Magnetic materials of application in transformer, Permanent magnets and motors, Eddy current and loss mechanism. Magnetic materials for high frequency applications.

4

7

Magnetic storage:
Overview of magnetic recording, reading and play back theories; magnetic materials as reading head and storage media; technological aspects of high density storage media.

4

8

Magnetoresistance:
Various types of magnetoresistance; Giant and colossal magnetoresistance materials and their applications. various techniques of magnetic recording and recovery.

4

9

Magnetic materials in refrigeration and cryogenics.

3

10

Magnetic resonance:
Magnetic resonance and their applications in science, environmental and medical diagnostics.

4

11

Spintronic devices and their applications in fast, reliable, non-volatile and miniaturized electronic circuits.

3

 

  1. D. Craik, Magnetism Principles and Applications, John Wiley.

  2. D. Jiles, Introduction to magnetism and magnetic materials, Chapmean and Hall.

  3. A.P. Guimarãs and I.S. Oliveira, Magnetism and Magnetic Resonance in Solids, John Wily & Sons, Inc.

  4. B.D. Cullity, Introduction to Magnetic Materials, Addison-Wesley.



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