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Thursday 28 February 2013

Magnetic Ceramics

Magnetic Ceramics
Marzia Hoque Tania

Introduction
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magnetized force is the force of attraction or repugnance of a magnetised material due to the arrangement of its atoms, oddly its electrons.

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All magnetized phenomena result from forces between electric charges in motion.

Demonstration of the magnetic flake associated with (a) an orbiting electron and (b) a spin around electron.

Classifications
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There are various types of magnetic material classified ad by their magnetic susceptibilities: diamagnetic paramagnetic and ferromagnetic/ferrimagnetic.

reeking Magnetism
Diamagnetism
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Induced magnetic dipoles directed reverse to the external magnetic domain of a function. Requirements: atoms with completely filled orbitals Magnetic moment: no magnetic moment without applied field compensation of spin moments permeability / susceptibility: ?r< 1 , ?m < 0 (weak effect) Materials: inert gases, loft watch crystals, semiconductors, Cu, Au, Ag

wonky Magnetism: Diamagnetism
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solicitude of magnetic moments (H = 0):

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impaction on lines of flux in a homogeneous magnetic field:

Weak Magnetism: Diamagnetism

Weak Magnetism: Diamagnetism

Weak Magnetism: Diamagnetism

Weak Magnetism
Paramagnetism ? Alignment of imperishable magnetic dipoles in the direction of the external magnetic field.

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? requirements: atoms with partially filled orbitals ? magnetic moment: permanent magnetic moment 0 (weak effect) ? materials: Alkali- and transition metals, out of date earth metals O2, Al, Sn, Pt

Weak Magnetism: Paramagnetism
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direction of magnetic moments (H = 0):

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impact on lines of flux in a homogeneous magnetic field:

Weak Magnetism: Paramagnetism

Weak Magnetism: Paramagnetism

Weak Magnetism: Paramagnetism

Strong Magnetism
Ferromagnetism ? Spontaneous alignment of all permanent magnetic dipoles within a domain in the crystal lattice (only metals). ? requirements: atoms with partially filled orbitals ? magnetic moment: large magnetic...If you want to get a full essay, order it on our website: Ordercustompaper.com



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