| Autor: |
Zhai HY; Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA., Ma JX, Gillaspie DT, Zhang XG, Ward TZ, Plummer EW, Shen J |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2006 Oct 20; Vol. 97 (16), pp. 167201. Date of Electronic Publication: 2006 Oct 17. |
| DOI: |
10.1103/PhysRevLett.97.167201 |
| Abstrakt: |
Optical lithography is used to fabricate LPCMO wires starting from a single (La(5/8-0.3)Pr(0.3))Ca3/8MnO3 (LPCMO) film epitaxially grown on a LaAlO3(100) substrate. As the width of the wires is decreased, the resistivity of the LPCMO wires exhibits giant and ultrasharp steps upon varying temperature and magnetic field in the vicinity of the metal-insulator transition. The origin of the ultrasharp transitions is attributed to the effect of spatial confinement on the percolative transport in manganites. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
