Magnetic Anisotropy Variations and Nonequilibrium Tunneling in a Cobalt Nanoparticle
- 7 November 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 87 (22) , 226801
- https://doi.org/10.1103/physrevlett.87.226801
Abstract
We present detailed measurements of the discrete electron-tunneling level spectrum within nanometer-scale cobalt particles as a function of magnetic field and gate voltage, in this way probing individual quantum many-body eigenstates inside ferromagnetic samples. Variations among the observed levels indicate that different quantum states within one particle are subject to different magnetic anisotropy energies. Gate-voltage studies demonstrate that the low-energy tunneling spectrum is affected dramatically by the presence of nonequilibrium spin excitations.Keywords
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This publication has 15 references indexed in Scilit:
- Theory of Tunneling Spectroscopy in Ferromagnetic NanoparticlesPhysical Review Letters, 2000
- Tunneling via Individual Electronic States in Ferromagnetic NanoparticlesPhysical Review Letters, 1999
- Effects of spin-orbit interactions on tunneling via discrete energy levels in metal nanoparticlesPhysical Review B, 1999
- Inverse Tunnel Magnetoresistance in: New Ideas on Spin-Polarized TunnelingPhysical Review Letters, 1999
- Probing Ferromagnets with Andreev ReflectionPhysical Review Letters, 1998
- Measuring the Spin Polarization of a Metal with a Superconducting Point ContactScience, 1998
- Spin Polarization and Magneto-Coulomb Oscillations in Ferromagnetic Single Electron DevicesJournal of the Physics Society Japan, 1998
- Enhanced Magnetic Valve Effect and Magneto-Coulomb Oscillations in Ferromagnetic Single Electron TransistorJournal of the Physics Society Japan, 1997
- Spectroscopic Measurements of Discrete Electronic States in Single Metal ParticlesPhysical Review Letters, 1995
- Spin-polarized electron tunnelingPhysics Reports, 1994