Monopoles in ferromagnetic metals
  The aim of this short review is to give an introduction to monopoles and to present theoretical derivation of two particular monopoles in ferromagnetic metals, a hedgehog monopole and a spin damping monopole. Spin damping monopoles can be generated in simple systems such as a junction of a ferromagnet and a heavy element with strong spin-orbit interaction such as Pt. This monopole is essential in coupling electronics with magnetism, and is thus expected to play an essential role in spintronics. 
Gen Tatara, Akihito Takeuchi, Noriyuki Nakabayashi and Katsuhisa   Taguchi
cond-mat.mes-hall