Magnetic circular dichroism studies of carrier-induced ferromagnetism in (Ga1-xMnx)As

Authors
Beschoten, B Crowell, PA Malajovich, I Awschalom, DD Matsukura, F Shen, A Ohno, H
Citation
B. Beschoten et al., Magnetic circular dichroism studies of carrier-induced ferromagnetism in (Ga1-xMnx)As, PHYS REV L, 83(15), 1999, pp. 3073-3076
Citations number
18
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
15
Year of publication
1999
Pages
3073 - 3076
Database
ISI
SICI code
0031-9007(19991011)83:15<3073:MCDSOC>2.0.ZU;2-X
Abstract
Magnetic circular dichroism is used to investigate the evolution of ferroma gnetism in the p-type magnetic semiconductor (Ga1-xMnx)As. Local Mn moments and holes produce two spectroscopically distinct contributions, whose prop erties reveal an antiferromagnetic Mn-hole alignment in the ferromagnetic s tate. These components are present in both metallic and insulating samples with different temperature and field dependences, suggesting that the holes play a mon active role in mediating the ferromagnetic exchange than in tra ditional RKKY systems.