Explain curie point and hystereris, Chemistry

Explain Curie point and hystereris?

An ordinary piece of iron generally has little or no net magnetic moment. Though, if it is placed in a strong enough external magnetic field, domains will re-orient in parallel with that field, and will remain re-oriented when field is turned off, Hence creating a "permanent" magnet. This magnetization as a function of external field is described by a hysteresis curve. However this state of aligned domains isn't a minimal-energy configuration, it's extremely stable and has been observed to persist for millions of years in seafloor magnetite aligned by Earth's magnetic field (whose poles can thereby be seen to flip at long intervals). Net magnetization can be destroyed by heating and then cooling (annealing) the material without an external field, however.


Posted Date: 9/26/2013 1:11:55 AM | Location : United States

Related Discussions:- Explain curie point and hystereris, Assignment Help, Ask Question on Explain curie point and hystereris, Get Answer, Expert's Help, Explain curie point and hystereris Discussions

Write discussion on Explain curie point and hystereris
Your posts are moderated
Related Questions

Electrophilic substitutions reactions: Electrophilic substitution includes the attack by an electrophile. It is denoted as S E ( S denotes substitution and E denotes elct

150ml of a gas at 27C is heated to 77C at constant pressure.find the new volume of the gas.

In early Greece, water was considered one of the four basic "elements" (earth, wind, and fire as the others) in the universe. With the discovery of more basic constituents, the ter

Tranquillizer or Hypnotics: The chemical substances employed for the treatment of stress, mild and harsh mental diseases are called tranquillizers. These are employed to relea

Which of the following sets of quantum numbers is not allowed : (1) n=1, l=0,m=0 s= +1/2                   (2) n=1, l=1,m=0 s= -1/2              (3) n=2, l=1,m=1 s= +1/2

Q. How to change in Oxidation Number in Redox Reactions? Ans. In reduction-oxidation, or redox, reactions, atoms undergo changes in their oxidation numbers. Consider th

Bromination of Toluene in presence of light or heat gives benzyl chloride, but chlorination of benzene in presence of light gives benzene hexachloride. Why?