Thermally driven magnon valve with perpendicular magnetic anisotropy
Abstract
The active manipulation of quasiparticles, other than electrons, is a feasible alternative for developing the next generation of devices for information processing. Exploring magnons is advantageous as they can travel far and fast due to their low dissipation and high group velocity, transferring spin without charge transport, thus reducing the Joule heating. Moreover, magnon currents can switch a film's magnetization via a magnon torque facilitated by a perpendicular magnetic anisotropy (PMA). We demonstrate the proof of principle for three states' memories via transport studies of thermally excited magnon currents at room temperature in ferrimagnetic insulating magnon valves TmIG/Au/TmIG with PMA. While varying the relative TmIG magnetizations orientation, magnon currents excited in TmIG films are detected as a voltage in a top platinum electrode film due to the inverse spin Hall effect. The magnon transmission is maximum in the parallel state where the two signals sum up. Possibilities are seen for wave-based nonvolatile magneto-resistive random-access memory, sensing, and logic devices.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 21, 2022
- Source ID
- 10.1063/5.0082849
Entities
People
- A.R. Rodrigues
- Antonio Azevedo
- E. Santos
- G. L. S. Vilela
- J. E. Abrão
- J. S. Moodera
- S. M. Rezende
Organizations
- Army Research Office
- Coordenação de Aperfeicoamento de Pessoal de Nível Superior
- Escola Politécnica de Pernambuco
- Federal University of Pernambuco
- Financiadora de Estudos e Projetos
- Fundação de Amparo à Ciência e Tecnologia de Pernambuco
- Massachusetts Institute of Technology
- National Council for Scientific and Technological Development
- National Science Foundation
- Office of Naval Research