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MA: Fachverband Magnetismus

MA 46: Spin: Transport, Orbitronics and Hall Effects I

MA 46.2: Vortrag

Donnerstag, 19. März 2020, 09:45–10:00, HSZ 403

Compensating the planar Hall effect for better transport measurements — •Tobias Kosub, Jürgen Fassbender, and Denys Makarov — Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Dresden, Germany

The planar Hall effect (PHE) can lead to transverse voltage in transport measurements, whenever the studied film has anisotropic conductivity, even when the material conductivity tensor has zero off-diagonal components. Therefore, the PHE presents a complication for measurements of actual transverse components of the conductivity tensor, which are typically several order of magnitude smaller than the longitudinal conductivity (e.g. normal, anomalous Hall effects).

We show that compensating the PHE delivers significant benefits for transverse resistance measurements: For spin Hall magnetoresistance, the longitudinal and transverse components can be easily separated providing easy access to the complex spin mixing conductivity [1].

For Hall probe magnetometry in in-plane magnetic field, the PHE is the dominant error term and rejecting it improves readings greatly.

Compensation of the PHE is achieved using the Zero-Offset Hall [2] measurement mode of the Tensormeter device [3].

[1] T. Kosub et al., Appl. Phys. Lett. 113, 222409 (2018)

[2] T. Kosub et al., Phys. Rev. Lett. 115, 097201 (2015)

[3] More info on: www.tensormeter.eu