Charge pumping in magnetic tunnel junctions: Scattering theory

Details Charge pumping in magnetic tunnel junctions: Scattering theory Charge pumping in magnetic tunnel junctions: Scattering theory

2008-01-11

arxiv.org/abs/0801.1779v3

Physical Review B 77, 180407(R) (2008)

Physics

Condensed Matter

Materials Science

4 pages, 3 figures. to be published on Physical Review B Rapid Communication

Scientific paper

10.1103/PhysRevB.77.180407

We study theoretically the charge transport pumped by magnetization dynamics through epitaxial FIF and FNIF magnetic tunnel junctions (F: Ferromagnet, I: Insulator, N: Normal metal). We predict a small but measurable DC pumping voltage under ferromagnetic resonance conditions for collinear magnetization configurations, which may change sign as function of barrier parameters. A much larger AC pumping voltage is expected when the magnetizations are at right angles. Quantum size effects are predicted for an FNIF structure as a function of the normal layer thickness.

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