Direct Measurement of the Spin Polarization of the Magnetic Semiconductor (Ga,Mn)As
- 31 July 2003
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 91 (5), 056602
- https://doi.org/10.1103/physrevlett.91.056602
Abstract
We have carried out a direct measurement of the degree of spin polarization () of the magnetic semiconductor using Andreev reflection spectroscopy. Analyses of the conductance spectra of high transparency junctions consistently yield an intrinsic value for greater than 85%. Our experiments also revealed an extreme sensitivity of the measured spin polarization to the nature and quality of the interface for this material.
This publication has 22 references indexed in Scilit:
- Highly enhanced Curie temperature in low-temperature annealed [Ga,Mn]As epilayersApplied Physics Letters, 2003
- Ferromagnetic semiconductorsSemiconductor Science and Technology, 2002
- A Group-IV Ferromagnetic Semiconductor: Mn
x
Ge
1−
x
Science, 2002
- Spintronics: A Spin-Based Electronics Vision for the FutureScience, 2001
- Large Tunneling Magnetoresistance in GaMnAsAlAsGaMnAs Ferromagnetic Semiconductor Tunnel JunctionsPhysical Review Letters, 2001
- Persistent sourcing of coherent spins for multifunctional semiconductor spintronicsNature, 2001
- Electric-field control of ferromagnetismNature, 2000
- Electrical spin injection in a ferromagnetic semiconductor heterostructureNature, 1999
- Injection and detection of a spin-polarized current in a light-emitting diodeNature, 1999
- Lateral drag of spin coherence in gallium arsenideNature, 1999