On the basis of a simplified Hamiltonian for transition metal impurities in diluted magnetic semiconductors (DMS), the nature of ferromagnetism in p-type III-V DMS are investigated. Ferromagnetism is governed by the Anderson-Hubbard parameter for 3d electrons of Mn2+ and their strong hybridization with the hole carriers in the semiconducting medium. The origin of ferromagnetism in these materials has similarity with the Zener mechanism. From the energetically preferable parallel orientation of Mn spins the Curie temperature is calculated for GaAs:Mn.
|Number of pages||4|
|Journal||Journal of Magnetism and Magnetic Materials|
|State||Published - Mar 2003|
|Event||Second Moscow International Symposium on Magnetism (MISM) - Moscow, Russian Federation|
Duration: 20 Jun 2001 → 24 Jun 2001
- Diluted magnetic semiconductors
- Impurity levels