what is the reason of magnetic field in a magnet?

Answer 1

http://en.wikipedia.org/wiki/Ferro-magnetism#Physical_origin
http://en.wikipedia.org/wiki/Ferro-magnetism

visit this web site you may get some idea.

Answer 2

An atom (as well as any system) is apt to a state when its potential energy would be minimal, the excess of energy if any being given up to space as photons. An electron rotating around nucleus could be considered as circular electric current and hence should produce magnetic field; in most atoms of solid bodies the principle of min potential energy dictates to compensate magnetic fields by electrons; for iron atoms the min potential energy principle leaves the magnetic field uncompensated. But the magnetic fields of atoms being at-random-oriented in a piece of iron still compensate each other. When an external magnetic field is applied to a piece of iron the atoms arrange along the external field and stay in this state being fixed in their crystalline lattices.

Answer 3

i think magnetic field is a force... so force has magnatitude and direction and travels in specific path...