Charge pumping and the colored thermal voltage noise in spin valves

2009/02/28 by Jiang Xiao, G. Bauer, Gerrit E. W. Bauer +2
Engineering · Physics and Astronomy · #Advanced Memory and Neural Computing #Magnetic properties of thin films #Quantum and electron transport phenomena #cond-mat.mes-hall #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevb.79.174415

published as Phys. Rev. B 79, 174415 (2009) · 9 pages, 2 figures

arxiv created 2009/04/29 · openalex publication_date 2009/05/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04

Abstract

Spin pumping by a moving magnetization gives rise to an electric voltage over a spin valve. Thermal fluctuations of the magnetization manifest themselves as increased thermal voltage noise with absorption lines at the ferromagnetic resonance frequency and/or zero frequency. The effect depends on the magnetization configuration and can be of the same order of magnitude as the Johnson-Nyquist thermal noise. Measuring colored voltage noise is an alternative to ferromagnetic resonance experiments for nanoscale ferromagnetic circuits.

Citations

• Current-driven excitation of magnetic multilayers
• Electrical Detection of Spin Pumping due to the Precessing Magnetization of a Single Ferromagnet
• Bias-driven high-power microwave emission from MgO-based tunnel magnetoresistance devices
• Thermal Agitation of Electric Charge in Conductors
• Magnetization dynamics with a spin-transfer torque
• Microwave oscillations of a nanomagnet driven by a spin-polarized current
• Thermal Agitation of Electricity in Conductors