Patent ID: 7893426
Filing Date: 2011-02-22
Classification: B82Y,G11C,H01F,H01L

Abstract:
1. A magnetoresistance single-charge tunnelling device comprising: first and second leads; a conductive island having a charging energy of at least 1 meV and arranged such that charge is transferable from the first lead to the second lead via the conductive island; and a gate for changing an electrostatic energy of the conductive island; and wherein at least one of said first lead, second lead, island and the gate comprises a ferromagnetic material which exhibits strong spin-orbit coupling such that the at least one of the said first lead, second lead, island and the gate exhibits a change in chemical potential of at least an order of the charging energy in response to rotation of magnetization from a first orientation to a second orientation which is not parallel or anti-parallel to the first orientation, wherein neither the first and second leads provide a pinned region; and wherein the single-charge tunneling device exhibits an anisotropic magnetoresistance effect and not a tunneling magnetoresistance effect wherein the first lead, the second lead and the island each comprise the same ferromagnetic material.