1 / 10

Metal based spintronics

Metal based spintronics. The Spin Hall Effect a nd its applications. The Hall Effect. Electric- and magnetic field cooperate to produce a difference of voltage across a conductor. The Spin Hall Effect. Predicted in 1971, named in 1999 No requirement for an external magnetic field

eddy
Download Presentation

Metal based spintronics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Metal based spintronics The Spin Hall Effect and its applications

  2. The Hall Effect • Electric- and magnetic field cooperate to produce a difference of voltage across aconductor.

  3. The Spin Hall Effect • Predicted in 1971, named in 1999 • No requirement for an external magnetic field • Anomalous Hall Effect (AHE) • DSHE • ISHE • Originates in the Spin-Orbit Interaction (Too complicated)

  4. Applications • Spin Transfer Torque • Spin Detection • Spin/Current conversion • Much more

  5. Spin Transfer Torque • Modifying the orientation of magnetical layers • STT-RAM • Better than MRAM • β-Ta & β-W

  6. Spin Detection • Using ISHE • Highly dependant on materials • DSHE materials such as Pl, Pd and Cu not good enough. • Efficiency of detection • ρC – Electrical Resistivity • αSH – Spin Hall Angle • ρSH ≈ ρC αSH – Spin Hall Resistivity • Metal Oxides, IrO2

  7. Spin/Current conversion • Using ”self induced” ISHE • Spin Ni80Fe20 ”Battery” • 1) Apply magnetic field • 2) Recieve current.

  8. Summary • Metals important in spintronics due to their magnetic properties. • The Spin Hall Effect gives us incredible control over spin/current detection and conversion • Many memory and energy applications

  9. Extra reading • Spin Orbit Interaction (SOI) • Spin Pumping • Dirac Equation • Hamiltonian Equation • Shrödinger Equations

  10. References • http://arxiv.org/ftp/arxiv/papers/1307/1307.2121.pdf • http://meetings.aps.org/Meeting/MAR13/Event/182726 • http://arxiv.org/ftp/arxiv/papers/1301/1301.3580.pdf • http://en.wikipedia.org/wiki/Spin_Hall_effect(For terminology reasons)

More Related