| dc.contributor.author | COEY, JOHN MICHAEL DAVID | |
| dc.date.accessioned | 2009-08-20T15:15:34Z | |
| dc.date.available | 2009-08-20T15:15:34Z | |
| dc.date.issued | 2005 | |
| dc.date.submitted | 2005 | en |
| dc.identifier.citation | O. C?spedes, S. M. Watts, J. M. D. Coey, K. D?_rr and M. Ziese 'Magnetoresistance and electrical hysteresis in stable half-metallic (La0.7Sr0.3 MnO3 and Fe3O4 nanoconstrictions' in Applied Physics Letters, 87, (8), 2005, 083102 | en |
| dc.identifier.issn | http://dx.doi.org/10.1063/1.1853497 | |
| dc.identifier.other | Y | |
| dc.description | PUBLISHED | en |
| dc.description.abstract | We have studied the transport properties of mechanically stable Fe3O4 and La0.7Sr0.3MnO3
nanoconstrictions patterned by focused ion-beam milling. The magnetoresistance decreases with the
square of the applied voltage and scales with the resistance of the constriction, with values up to
8000% for magnetite and 100% for La0.7Sr0.3MnO3. These results are interpreted within a model for
domain-wall magnetoresistance. Some samples exhibit electrical hysteresis with discrete changes of
resistance that disappear in the presence of a magnetic field, indicating domain-wall displacement
driven by a spin-polarized current. | en |
| dc.description.sponsorship | This work was supported by Science Foundation Ireland.
The authors are grateful to Dr. Alberto Bollero for the magnetite
films on MgAlO4 substrates. | en |
| dc.format.extent | 83102 | en |
| dc.format.extent | 451359 bytes | |
| dc.format.mimetype | application/pdf | |
| dc.language.iso | en | en |
| dc.publisher | American Institute of Physics | en |
| dc.relation.ispartofseries | Applied Physics Letters | en |
| dc.relation.ispartofseries | 87 | en |
| dc.relation.ispartofseries | 8 | en |
| dc.rights | Y | en |
| dc.subject | Physics | en |
| dc.title | Magnetoresistance and electrical hysteresis in stable half-metallic (La0.7Sr0.3 MnO3 and Fe3O4 nanoconstrictions | en |
| dc.type.supercollection | scholarly_publications | en |
| dc.type.supercollection | refereed_publications | en |
| dc.identifier.peoplefinderurl | http://people.tcd.ie/jcoey | |
| dc.contributor.sponsor | Science Foundation Ireland | |
| dc.contributor.sponsor | Enterprise Ireland | en |
| dc.identifier.uri | http://hdl.handle.net/2262/31850 | |
