Competing spin pumping effects in magnetic hybrid structures

Journal Article · Mon Feb 03 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4863751· OSTI ID:22283275

Alves Santos, O.; Fonseca Guerra, G. A.; Cunha, R. O.; Rezende, S. M. ^[1]; Rodríguez-Suárez, R. ^[2]

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1. Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, PE (Brazil)
2. Facultad de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago (Chile)

Pure spin current can be detected by its conversion into charge current in nanometer thick nonmagnetic metal layer with large spin-orbit coupling by means of the inverse spin Hall effect (ISHE). Recently, it has been shown that the metallic ferromagnet Permalloy (Py) can also be used as spin current detector in experiments in which an ISHE voltage is created in a Py layer in contact with the insulating ferromagnet yttrium iron garnet (YIG) under a thermal gradient in the longitudinal spin Seebeck configuration. Here, we report experiments with microwave driven spin pumping in heterostructures made with single crystal YIG film and a nanometer thick Py or Pt layer that show that Py behaves differently than nonmagnetic metals as a spin current detector. The results are attributed to the competition between the spin currents generated by the dynamics of the magnetizations in YIG and in Py, which are exchange coupled at the interface.

• OSTI ID: 22283275
• Journal Information: Applied Physics Letters, Vol. 104, Issue 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
FERRITE GARNETS
FERROMAGNETISM
HALL EFFECT
INTERFACES
IRON OXIDES
LAYERS
L-S COUPLING
MAGNETIZATION
MICROWAVE RADIATION
MONOCRYSTALS
PERMALLOY
PUMPING
SPIN
TEMPERATURE GRADIENTS
THIN FILMS
YTTRIUM COMPOUNDS