We present \textit{ab initio} studies for different Ni nanocontacts and show changes in the conductance of such constrictions due to atomic rearrangements in the contact. In particular we consider a Ni particle and show that the magnetoresistance can change from a few to 50% and can even reverse sign as a function of the contact area formed between the particle and the leads.
@article{arxiv.1105.1878,
title = {Tailoring magnetoresistance through rotating Ni particles},
author = {Steven Achilles and Michael Czerner and Ingrid Mertig},
journal= {arXiv preprint arXiv:1105.1878},
year = {2011}
}
Comments
10 pages, 4 figures, 7 tables; corrected typos in references