Electromotive force and huge magnetoresistance in magnetic tunnel junctions

@article{Hai2009ElectromotiveFA,
  title={Electromotive force and huge magnetoresistance in magnetic tunnel junctions},
  author={Pham Nam Hai and Shinobu Ohya and Masaaki Tanaka and Stewart E. Barnes and Sadamichi Maekawa},
  journal={Nature},
  year={2009},
  volume={458},
  pages={489-492}
}
The electromotive force (e.m.f.) predicted by Faraday’s law reflects the forces acting on the charge, –e, of an electron moving through a device or circuit, and is proportional to the time derivative of the magnetic field. This conventional e.m.f. is usually absent for stationary circuits and static magnetic fields. There are also forces that act on the spin of an electron; it has been recently predicted that, for circuits that are in part composed of ferromagnetic materials, there arises an e… 
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