Current Fluctuations in Ferromagnetic Tunnel Junctions

• Authors: B. Bułka , J. Martinek , G. Michałek , J. Barnaś
• Languages of publication: EN

Abstracts

EN

Current shot noise in a double junction consisting of a small metallic grain connected to two ferromagnetic electrodes is analysed in the limit of sequential tunneling. We show that, apart from charge fluctuations, there are strong spin fluctuations. We also show that two distinct relaxation processes can be distinguished in the frequency dependent current noise: one in a low frequency range and corresponding to spin fluctuations and another one in a high frequency range corresponding to charge fluctuations.

Keywords

EN

75.70.Pa; 73.50.Td; 73.23.Hk; 73.40.Gk

Discipline

• 73.23.Hk: Coulomb blockade; single-electron tunneling
• 73.40.Gk: Tunneling(for tunneling in quantum Hall effects, see 73.43.Jn)
• 73.50.Td: Noise processes and phenomena

• Journal: Acta Physica Polonica A
• Year: 2000
• Volume: 97
• Issue: 3
• Pages: 423-426

Dates

published

2000-03

Contributors

author

B. Bułka

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

J. Martinek

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

G. Michałek

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

J. Barnaś

• Department of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

Identifiers

DOI

10.12693/APhysPolA.97.423