Negligible thermal contributions to the spin pumping signal in ferromagnetic metal–platinum bilayers

Spin pumping by ferromagnetic resonance is one of the most common techniques to determine spin Hall angles, Edelstein lengths, or spin diffusion lengths of a large variety of materials. In recent years, there have been increasing concerns over the interpretation of these experiments, underlining tha...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of applied physics 2020-04, Vol.127 (16)
Hauptverfasser: Noël, Paul, Cosset-Cheneau, Maxen, Haspot, Victor, Maurel, Vincent, Lombard, Christian, Bibes, Manuel, Barthelemy, Agnès, Vila, Laurent, Attané, Jean-Philippe
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Spin pumping by ferromagnetic resonance is one of the most common techniques to determine spin Hall angles, Edelstein lengths, or spin diffusion lengths of a large variety of materials. In recent years, there have been increasing concerns over the interpretation of these experiments, underlining that the signal could arise purely from thermoelectric effects rather than coherent spin pumping. Here, we propose a method to evaluate the presence or absence of thermal effects in spin pumping signals, by combining bolometry and spin pumping by ferromagnetic resonance measurements and comparing their timescale. Using a cavity to perform the experiments on Pt\permalloy and La0.7Sr0.3MnO3\Pt samples, we conclude on the absence at resonance of any measurable thermoelectric contribution such as the spin Seebeck and anomalous Nernst effects.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0004614