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Electric power transfer in spin-pumping experiments

Accepted version
Peer-reviewed

Type

Article

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Authors

Rogdakis, K 
Alfert, N 
Srivastava, A 
Robinson, JWA 
Blamire, MG 

Abstract

Spin pumping is becoming an established method to generate voltages from magnetic dynamics. The standard detection method of spin pumping is based on open circuit voltage measurement across ferromagnetic (FM) and non-magnetic (NM) bi-layers, where the inverse spin-Hall effect (ISHE) can convert spin currents into electrical charge accumulation. In this paper, we present that it is also possible to measure the associated electric charge current generated in FM/NM bi-layers, by using a macroscopic closed circuitry detection method. Using variable load resistors connected in series to the sample, we quantified charge currents and associated electric power dissipation as a function of the load resistance. By using basic circuit analysis, we are able to describe spin pumping cells as a non-ideal voltage source or equivalent current source with an internal resistor.

Description

Keywords

cond-mat.other, cond-mat.other

Journal Title

Applied Physics Express

Conference Name

Journal ISSN

1882-0778
1882-0786

Volume Title

11

Publisher

IOP Publishing
Sponsorship
Engineering and Physical Sciences Research Council (EP/N017242/1)
Engineering and Physical Sciences Research Council (EP/P026311/1)