Magnetic materials, Physics

Magnetic materials:

Ferromagnetic materials:

Ferromagnetic materials can be easily magnetised and exhibit strong magnetic properties. This group can be further subdivided into hard and soft magnetic materials.

Above certain temperatures ferromagnetic materials behave as paramagnetic materials.

Hard Iron

Hard magnetic materials are more difficult to magnetise but retain most of their magnetism when the magnetising force is removed.
Examples steel and nickel alloys such as:

Ticonal Iron Cobalt / Nickel / Aluminium / Titanium and Copper
Alnico Iron Nickel / Cobalt And Aluminium

These materials are used for permanent magnets

Soft Iron

Soft magnetic materials become magnetised very easily, but they loose most of the magnetism when the magnetising force is removed.
Examples alloys such as stalloy and mumetal

These materials are used for temporary magnets

PARAMAGNETIC MATERIALS

Most materials fall into this group. These materials can only be magnetised with a great amount of effort, usually resulting in their destruction. If magnetised the material only exhibits small magnetic properties.

Examples - Wood / Glass /Air / Water / Aluminium

DIAMAGNETIC MATERIALS

This is a small group of materials that actually oppose a magnetising force. If placed in a magnetic field they will decreases its strength. If suspended in a magnetic field, they will swing to adopt a position at 90 degrees to the lines of flux.

Examples - Copper / Brass / Bronze / Mercury / Bismuth

 

Posted Date: 9/13/2012 5:29:58 AM | Location : United States







Related Discussions:- Magnetic materials, Assignment Help, Ask Question on Magnetic materials, Get Answer, Expert's Help, Magnetic materials Discussions

Write discussion on Magnetic materials
Your posts are moderated
Related Questions
Figure shows an arrangement  of a carriage system.  A force P is applied on the carriage B and moving rightward at 3 m/s 2 constant acceleration.  At the instant shown the velocit

the maximum height attained by a projectile and its horizontal range are equal to each other if the projectile projected at an angle [theta] given by ?

The specific resistance of copper is 1.7ohm. find the resistance of copper wire of length 10m and diameter 1mm. solution) R=ρ*l/A so ou have ρ,l and r(radius). you can use the f

Which Is Best Tan A position Or Tan B Position.?

The primary coil of an ideal step-up transformer has 100 turns and the transformation ratio is also 100. The input voltage the power are 220 V and 1100 W respectively. Calculat

I''m transmitting microwave radiation from antenna to satellite..so when radiation(photons) is transmitted,how they interact with the molecules in the atmosphere layer by layer..I

Hawking radiation (S.W. Hawking; 1973): Black holes emit radiation such as any other hot body. Virtual particle-antiparticle pairs are being formed in supposedly empty space c

Explain the term 'resistivity' and write its S. I . unit. Derive the expression for the resistivity of a conductor in terms of number density of free electrons and relaxation time.

A merry-go-round in the park has a radius of 2.6 m and a moment of inertia of  1773 kg.m 2 What is the mass of the  merry-go-round?

Please explain diagram of nicol prism, How its working and how its mechanism,,,