Magnetar magnetic field strength?

[flet]

Does anyone know why the magnetic field of a magnetar is so strong?

Are they different from ordinary neutron stars in any other way?

Thanks for your help. :)

[BPO]

http://en.wikipedia.org/wiki/Magnetar#Origins_of_magnetic_fields



http://en.wikipedia.org/wiki/Magnetar#Description

[astronut]

I would recommend reading Prof Bryan Gaensler's book, Extreme Cosmos.
An excellent read.:)