JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objective

With the ever growing material world, the subject of metallurgy and materials engineering has grown in alarming complex manner. At the present the study of materials science has been greatly developed in many modern fields due to the new material such as magnetic, microelectronic and smart alloys. This subject is formulated to expose the students to the fundamentals and processing of magnetic and electronic materials

Course Outcome

At the end of the course the student will be able to

• 1. Understand the properties to be considered in designing magnetic and electronic materials know the manufacturing process of electronic materials
• 2. Understand the concepts in development of smart materials and devices

UNIT - I

Magnetic Materials: Definition of Magnetic field, Magnetic Induction, Magnetic Field Intensity, Magnetic Susceptibility. Types of Magnetic Materials: Paramagnetic, Diamagnetic, Ferromagnetic, Anti Ferromagnetic, Ferrimagnetic materials.

UNIT - II

Theories of Para, Dia and Ferromagnetism, Curie Temperature, Domain theory of Ferromagnetism, Reversible and Irreversible domains. Bark Haussan Effect.

UNIT - III

Hysteresis loop, Domain Interpretation of Hysteresis curve, interpretation of hysteresis and hand magnetic Materials, differences in magnetic properties of hard and soft magnetic materials, magnetic anisotropy and magnetostriction. Applications of magnetic materials: soft and hard, high energy hard magnetic materials, magnetic storage, ferrite core memories, bubble memories

UNIT - IV

Semi conductors, Band theory and solids, distribution of energy states, classification of semi conductors, intrinsic and extrinsic , n type and p type, variation of carrier concentration with temperature, Hall effect, forward baising and reverse baising semi conductor devices

UNIT - V

Production of metallurgical grade silicon, photo lithography pattern transfer, metallization, silicon IC chip, packaging, encapsulation of IC chip, tape automated bonding, smart,

R16 B.TECH METALLURGY AND MATERIALS ENGG.

intelligent, active materials, piezo electric ceramics, polymers, chemical sensors, electrochemical sensors, shape memory alloys

TEXT BOOKS:

• 1. Electronic properties of materials, R E Hummel
• 2. Ferromagnetic materials structure and properties, RA Macurie

REFERENCES:

• 1. An introduction to materials science , HL Mancini
• 2. Magnetic Materials fundamentals and devices, Nicols Spaldin R16 B.TECH METALLURGY AND MATERIALS ENGG.