Detailed characteristics and tunnel magnetoresistance (TMR) properties of the double tunnel junctions (DTJs) through Co80Pt20, hard magnetic particles were investigated in the low barrier height regime. Significant difference in current distribution effect was observed in DTJs through discontinuous particles. No geometrically enhanced magnetoresistance occurs in the cross-shaped 0.01 mm2 size junctions when the measured junction resistance is 10 times smaller than the electrode resistance due to the decrease in the effective junction area in DTJs with discontinuous ferromagnetic particles. Moreover, temperature independent TMR ratio and enhancement of the TMR ratio in a low bias voltage regime were observed in DTJs through Co80Pt20 hard magnetic particles in low barrier height regime.
- Ferromagnetic double tunnel junctions
- Temperature and dc bias dependencies
- Tunnel magnetoresistance
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering