Abstract
Magnetic circular dichroism is used to investigate the evolution of ferromagnetism in the p-type magnetic semiconductor (Ga1-xMnx)As. Local Mn moments and holes produce two spectroscopically distinct contributions, whose properties reveal an antiferromagnetic Mn-hole alignment in the ferromagnetic state. These components are present in both metallic and insulating samples with different temperature and field dependences, suggesting that the holes play a more active role in mediating the ferromagnetic exchange than in traditional RKKY systems. 1999
Original language | English (US) |
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Pages (from-to) | 3074-3076 |
Number of pages | 3 |
Journal | Physical review letters |
Volume | 83 |
Issue number | 15 |
DOIs | |
State | Published - Jan 1 1999 |