Quantum-well effect in magnetic tunnel junctions with ultrathin single-crystal Fe(100) electrodes

Nagahama, T.; Yuasa, S.; Suzuki, Y.; Tamura, E.
December 2001
Applied Physics Letters;12/24/2001, Vol. 79 Issue 26, p4381
Academic Journal
We studied the tunnel spectra of magnetic tunnel junctions with a single-crystal ultrathin Fe(100) electrode. The tunnel spectra show oscillations of the differential conductivity and the differential tunnel magnetoresistance. The positions of the maxima of the oscillations move systematically with the change in the Fe(100) electrode’s thickness, indicating that the oscillations originate from the quantum-well states in the ultrathin Fe(100) electrode. This effect provides us with an opportunity to create voltage-controlled spin functional devices. © 2001 American Institute of Physics.


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