Microwave coupled electron tunneling measurement of Co nanoparticles
arXiv:1106.5809 · doi:10.1063/1.3614554
Abstract
We study electron tunneling through Co nanoparticles in the presence of repeated microwave pulses at 4.2K. While individual pulses are too weak to affect the magnetic switching field, repeated microwave pulses start to reduce the magnetic switching field at 10μs spacing. We use I-V curve as a thermometer to show that the microwave pulses do not heat the sample, showing that magnetization in Co nanoparticles is directly excited by microwave pulses, and the relaxation time of the excitation energy is in the range of microsecond.
arXiv comment10 pages, 5 figures
References in corpus (13)
- Switching of magnetization by non-linear resonance studied in single nanoparticles
- Tunneling Via Individual Electronic States in Ferromagnetic Nanoparticles
- Spectroscopy, Interactions and Level Splittings in Au Nanoparticles
- Magnetic Anisotropy Variations and Non-Equilibrium Tunneling in a Cobalt Nanoparticle
- The Magneto-coulomb effect in spin valve devices
- Spin Polarization and Magneto-Coulomb Oscillations in Ferromagnetic Single Electron Devices
- Theory of Tunneling Spectroscopy in Ferromagnetic Nanoparticles
- A Model for Ferromagnetic Nanograins with Discrete Electronic States
- Magneto-Coulomb Oscillation in Ferromagnetic Single Electron Transistors
- Current induced Spin Torque in a nanomagnet
- Saturation of Spin-Polarized Current in Nanometer Scale Aluminum Grains
- Electron-magnon coupling and nonlinear tunneling transport in magnetic nanoparticles
- Microwave coupled electron tunneling measurement of Co nanoparticles