Abstract
A giant magnetoresistance ratio of 30% at 4.2 K and 18% at 300 K was observed for the first time in an Fe/Al2O3/Fe junction. The conductance at room temperature was expressed well by G=96.2 (1 + 0.09 cos θ)(Ω-1), where θ is the angle between the magnetizations of two iron electrodes. The dependence of the magnetoresistance ratio, saturated resistance and also the tunneling current on temperature were measured in the range 4.2-300 K. The results support the claim that the giant magnetoresistance is due to the magnetic tunneling of electrons between the electrodes through the thin Al2O3 insulator.
Original language | English |
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Journal | Journal of Magnetism and Magnetic Materials |
Volume | 139 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1995 Jan 2 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics