due to spins of electrons having magnitudes of ±1/2. Thespins interact with their neighbouring dipole electrons in the structure and here the Ising model
(页面存档备份,存于互联网档案馆)", Space.com, 10 September 2003 Astronomical studies of the Koronis Family (页面存档备份,存于互联网档案馆) Spins on Koronis family (页面存档备份,存于互联网档案馆)
Dimensionality of Spins. Phys. Rev. Lett. 1968, 20: 589–592. Bibcode:1968PhRvL..20..589S. doi:10.1103/PhysRevLett.20.589. de Gennes, P. G. Exponents for the excluded