Work

Spin Hall magnetoimpedance

Year: 2014

Type: article

Abstract: The recently discovered spin Hall magnetoresistance effect electrically probes pure spin current flow across a ferrimagnetic insulator/normal metal bilayer interface. While usually the dc electrical resistance of the bilayer is measured as a function of the magnetization orientation in the magnetic insulator, here we present magnetoimpedance measurements using bias currents with frequencies up to several GHz. We find that the spin Hall magnetoresistance effect is frequency independent up to frequencies of 3 GHz, corroborating the assumption of a frequency-independent spin Hall angle. Our data therefore show that all interaction time constants relevant for the spin Hall magnetoresistance effect are shorter than about 50 ps. Therefore this technique should allow for the fast readout of the magnetization direction in magnetic insulator/normal metal bilayers.

Source: Physical Review B

DOI: 10.1103/physrevb.90.174419

Authors: Johannes Lotze, Hans Huebl, Rudolf Gross, Sebastian T. B. Goennenwein

Institutions: Bavarian Academy of Sciences and Humanities, Walther Meissner Institute, Technical University of Munich, Nanosystems Initiative Munich

Language: Finnish

Topic: Magnetic properties of thin films

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Deutsche Forschungsgemeinschaft

Award: G4925076582