Abstract
La0.7Sr0.3MnO3 (LSMO) step-edge junctions were fabricated on step-edge (001) SrTiO3 substrates. Above room temperature (RT) the step-edge junctions showed vanishing tunneling magnetoresistance (TMR) spikes in R(H) curves. To study the conduction mechanism of polarized electrons accross grain boundaries the MR ratio and the dynamic conduction at various temperatures was measured. The results show that tunneling is the dominating mechanism and the charge carriers at the surface boundary govern the tunneling conductivity.
Original language | English |
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Pages (from-to) | 4928-4933 |
Number of pages | 6 |
Journal | Journal of Applied Physics |
Volume | 95 |
Issue number | 9 |
DOIs | |
Publication status | Published - 2004 May 1 |
ASJC Scopus subject areas
- General Physics and Astronomy