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JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY
HYDERABAD
IV. B.Tech. MMT I-Sem T P C
4+1* 0 4
SEMI CONDUCTORS AND MAGNETIC MATERIALS
(ELECTIVE-I)
UNIT-I
Review of electron theory of metals; Electrical and thermal conductivity – Classical approach and quantum mechanical considerations; Resistivity of pure metals and alloys, and ordered alloys; thermoelectric phenomena.
UNIT-II
Semiconductors: Band structures, intrinsic semiconductors, extrinsic semiconductors; Hall effect; Elemental and compound Semiconductors and their application; Super conductivity; super conducting materials; Structure and application.
UNIT-III
Ferromagnetism: Ferromagnetic domains; Hysteresis loops, magnetostriction and magnetoelectricity, origin of Hysteresis due to domain wall movement; soft magnetic alloys.
UNIT-IV
Factors determining the permeability of metals and alloys; Effect of fundamental properties on permeability, Ni-Fe alloys, Fe-Co alloys, high permeability of iron and ferritic iron, Si – Fe alloys and Cu – Ni alloys.
UNIT-V
Amorphous ferromagnetic alloys and Ferro fluids: Preparation and structure of amorphous ferromagnetic and its application; Ferro fluids;
UNIT-VI
Ferri magnetic material; Spiral structure; Theory of ferrimagnetisms; magnetic structures of ferrites; permeability of ferrites; stress-induced anisotropy in ferrites; Applications of soft ferrites.
UNIT-VII
Permanent magnetic materials: Energy product of a permanent magnet material; Behavior of permanent magnets under dynamic or recoil conditions; Alnicos; Fe- Cr-Co alloys.
UNIT-VIII
Cu-Ni-Fe and Cu-Ni-Co alloys; Fe-Co-Mo alloys, Pt-Co alloys; Permagnent, magnets based on the intermetallic compound Sm2 Cal2 Coercivity mechanisms; Applications of permanent magnetic; Temperature dependence of magnetic properties of permanent magnets;
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| Author: India 22 Dec 2007 | Member Level: Diamond Points : 3 |
TEXT BOOKS:
1. R.E. Hummel: Electronic Properties of materials.
2. R.A. Macurie: Ferromagnetic Materials structure and properties.
REFERENCE:
1. An Introduction to Materials science-H.L.Mancini.
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| Author: India 22 Dec 2007 | Member Level: Diamond Points : 3 |
TEXT BOOKS:
1. R.E. Hummel: Electronic Properties of materials.
2. R.A. Macurie: Ferromagnetic Materials structure and properties.
REFERENCE:
1. An Introduction to Materials science-H.L.Mancini.
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