Charge pumping in magnetic tunnel junctions: Scattering theory

Jiang Xiao, Gerrit E.W. Bauer, Arne Brataas

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


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 a 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.

Original languageEnglish
Article number180407
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number18
Publication statusPublished - 2008 May 22


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