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- W1995328329 abstract "We theoretically study the recently observed tunnel-barrier-enhanced dc voltage signals generated by magnetization precession in magnetic tunnel junctions. While the spin pumping is suppressed by the high tunneling impedance, two complementary processes are predicted to result in a sizable voltage generation in ferromagnet $(text{F})|text{insulator}phantom{rule{0.3em}{0ex}}(text{I})|text{normal}phantom{rule{0.3em}{0ex}}text{metal}phantom{rule{0.3em}{0ex}}(text{N})$ and $text{F}|text{I}|text{F}$ junctions with one ferromagnet being resonantly excited. Magnetic dynamics in $text{F}|text{I}|text{F}$ systems induce a robust charge pumping, translating into voltage in open circuits. In addition, dynamics in a single ferromagnetic layer develop longitudinal spin accumulation inside the ferromagnet. A tunnel barrier then acts as a nonintrusive probe that converts the spin accumulation into a measurable voltage. Neither of the proposed mechanisms suffers from spin relaxation, which is typically fast on the scale of the exponentially slow tunneling rates. The longitudinal spin-accumulation buildup, however, is very sensitive to the phenomenological ingredients of the spin-relaxation picture." @default.
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- W1995328329 date "2008-07-03" @default.
- W1995328329 modified "2023-09-26" @default.
- W1995328329 title "Tunnel-barrier-enhanced dc voltage signals induced by magnetization dynamics in magnetic tunnel junctions" @default.
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- W1995328329 doi "https://doi.org/10.1103/physrevb.78.020401" @default.
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