Tunnel-barrier-enhanced dc voltage signals induced by magnetization dynamics in magnetic tunnel junctions
arXiv:0803.4228 · doi:10.1103/PhysRevB.78.020401
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 complimentary processes are predicted to result in a sizable voltage generation in ferromagnet (F)|insulator (I)|normal-metal (N) and F|I|F junctions, with one ferromagnet being resonantly excited. Magnetic dynamics in F|I|F systems induces a robust charge pumping, translating into voltage in open circuits. In addition, dynamics in a single ferromagnetic layer develops 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.
5 pages, 2 figures
References in corpus (10)
- Enhanced Gilbert Damping in Thin Ferromagnetic Films
- Nonlocal magnetization dynamics in ferromagnetic heterostructures
- Spin pumping and magnetization dynamics in metallic multilayers
- Spin battery operated by ferromagnetic resonance
- Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet
- Voltage generation by ferromagnetic resonance
- Tunnel barrier enhanced voltage signals generated by magnetization precession of a single ferromagnetic layer
- Charge pumping in magnetic tunnel junctions: Scattering theory
- Spontaneous-Symmetry-Breaking Mechanism of Adiabatic Pumping
- Large voltage from spin pumping in magnetic tunnel junctions
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