Anisotropic magnetoresistance in nanocontacts - Condensed Matter > Mesoscale and Nanoscale PhysicsReport as inadecuate




Anisotropic magnetoresistance in nanocontacts - Condensed Matter > Mesoscale and Nanoscale Physics - Download this document for free, or read online. Document in PDF available to download.

Abstract: We present ab initio calculations of the evolution of anisotropicmagnetoresistance AMR in Ni nanocontacts from the ballistic to the tunnelregime. We find an extraordinary enhancement of AMR, compared to bulk, in twoscenarios. In systems without localized states, like chemically pure breakjunctions, large AMR only occurs if the orbital polarization of the current islarge, regardless of the anisotropy of the density of states. In systems thatdisplay localized states close to the Fermi energy, like a single electrontransistor with ferromagnetic electrodes, large AMR is related to the variationof the Fermi energy as a function of the magnetization direction.



Author: D. Jacob, J. Fernandez-Rossier, J. J. Palacios

Source: https://arxiv.org/







Related documents