Magnetoelectric tuning of the inverse spin-Hall effect

We demonstrate in this article that the magnetoelectric (ME) mechanism can be exploited to control the spin current emitted in a spin pumping experiment using moderate electric fields. Spin currents were generated at the interface of a ferromagnet/metal bilayer by driving the system to the ferromagn...

Full description

Saved in:
Bibliographic Details
Published in:AIP advances 2017-05, Vol.7 (5), p.055911-055911-4
Main Authors: Vargas, José M., Gómez, Javier E., Avilés-Félix, Luis, Butera, Alejandro
Format: Article
Language:English
Subjects:
Electric fields
Electromagnetism
Ferromagnetic resonance
Ferromagnetism
Hall effect
Hybrid composites
Intermetallic compounds
Iron compounds
Lead titanates
Magnesium niobates
Magnetism
Magnetron sputtering
Platinum compounds
Single crystals
Spin-orbit interactions
Spintronics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We demonstrate in this article that the magnetoelectric (ME) mechanism can be exploited to control the spin current emitted in a spin pumping experiment using moderate electric fields. Spin currents were generated at the interface of a ferromagnet/metal bilayer by driving the system to the ferromagnetic resonance condition at X-Band (9.78 GHz) with an incident power of 200 mW. The ME structure, a thin (20 nm) FePt film grown on top of a polished 011-cut single crystal lead magnesium niobate-lead titanate (PMN-PT) slab, was prepared by dc magnetron sputtering. The PMN-PT/FePt was operated in the L-T mode (longitudinal magnetized-transverse polarized). This hybrid composite showed a large ME coefficient of 140 Oe cm/kV, allowing to easily tune the ferromagnetic resonance condition with electric field strengths below 4 kV/cm. A thin layer of Pt (10 nm) was grown on top of the PMN-PT/FePt structure and was used to generate and detect the spin current by taking advantage of its large spin-orbit coupling that produces a measurable signal via the inverse spin-Hall effect. These results proved an alternative way to tune the magnetic field at which the spin current is established and consequently the inverse spin-Hall effect signal, which can promote advances in hybrid spintronic devices.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4973845