Conference Proceeding

Quantitative model for TMR and spin-transfer torque in MTJ devices

Electron Devices Meeting, 1988. IEDM '88. Technical Digest., International 01/2011; DOI:10.1109/IEDM.2010.5703417 pp.22.8.1 - 22.8.4 In proceeding of: Electron Devices Meeting (IEDM), 2010 IEEE International
Source: IEEE Xplore

ABSTRACT We present a Non-Equilibrium Green's Function (NEGF)-based model for spin torque transfer (STT) devices which provides qualitative as well as quantitative agreement with experimentally measured (1) differential resistances, (2) Magnetoresistance (MR), (3) In-plane torque (τ∥) and (4) out-of-plane torque (τ⊥) over a range of bias voltages, using a single set of three adjustable parameters. We believe our model is able to cover this diverse range of experiments.

0 0
 · 
0 Bookmarks
 · 
47 Views
  • Source
    Article: Voltage Asymmetry of Spin-Transfer Torques
    Deepanjan Datta, Behtash Behin-Aein, Sayeef Salahuddin, Supriyo Datta
    [show abstract] [hide abstract]
    ABSTRACT: We present a Non-Equilibrium Green's Function based model for spin torque transfer (STT) devices which provides quantitative agreement with experimentally measured (1) differential resistances, (2) Magnetoresistance (MR), (3) In-plane torque and (4) out-of-plane torque over a range of bias voltages, using a single set of three adjustable parameters. We believe this is the first theoretical model that is able to cover this diverse range of experiments and a key aspect of our model is the inclusion of multiple transverse modes. We also provide a simple explanation for the asymmetric bias dependence of the in-plane torque, based on the polarization of the two contacts in energy range of transport.
    10/2009;
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.

Keywords

bias voltages
 
NEGF)-based model
 
Non-Equilibrium Green's Function
 
provides qualitative
 
quantitative agreement
 
torque transfer