In this paper we report an exhaustive experimental work on magnetoresistance effects found in a system in which a large number of nanocontacts are produced between oxidized Fe fine particles. We have obtained the following performances: i) Huge low field room temperature magnetoresistance (over 1000%). ii) Non-linear I-V at different applied fields and temperatures. iii) Large thermal stability and reproducible resistance value under thermal cycles from room temperature down to 5 K. iv) Easy to fabricate with an almost 100% success. v) Heavy duty and transportable samples with reproducibility tested in several laboratories. We realized that the extraordinary effect found is related to the oxygen content at the particles surface
@article{arxiv.cond-mat/0502046,
title = {Huge Ballistic Magnetoresistance in Multiple Nanocontacts Devices},
author = {N. Garcia and M. R. Ibarra and C. Hao1 and R. F. Pacheco and D. Serrate},
journal= {arXiv preprint arXiv:cond-mat/0502046},
year = {2007}
}