Mesoscopic anisotropic magnetoconductance fluctuations in ferromagnets
Shaffique Adam, Markus Kindermann, Saar Rahav, and Piet W. Brouwer
TL;DR
This paper investigates how quantum interference and spin-orbit scattering cause anisotropic magnetoresistance fluctuations in ferromagnetic particles, revealing the dependence of conductance autocorrelation on magnetization orientation.
Contribution
It provides a theoretical calculation of the conductance autocorrelation function's dependence on magnetization rotation in ferromagnets, highlighting quantum interference effects.
Findings
Conductance fluctuations depend on magnetization angle.
Spin-orbit scattering couples electron motion to exchange field.
Autocorrelation function varies with magnetization orientation.
Abstract
The conductance of a ferromagnetic particle depends on the relative orientation of the magnetization with respect to the direction of current flow. This phenomenon is known as "anisotropic magnetoresistance". Quantum interference leads to an additional, random dependence of the conductance on the magnetization direction. These "anisotropic magnetoresistance fluctuations" are caused by spin-orbit scattering, which couples the electron motion to the exchange field in the ferromagnet. We report a calculation of the dependence of the conductance autocorrelation function on the rotation angle of the magnetization direction.
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Taxonomy
TopicsMagnetic properties of thin films · Quantum and electron transport phenomena · Magnetic Field Sensors Techniques