| Issue |
EPL
Volume 89, Number 6, March 2010
|
|
|---|---|---|
| Article Number | 67003 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/89/67003 | |
| Published online | 13 April 2010 | |
Structure and magnetic property of (Ga,Cr)As films with different Cr contents
1
State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences - P.O. Box 912, Beijing 100083, China
2
National Synchrotron Radiation Laboratory, University of Science and Technology of China - Hefei 230029, China
Corresponding author: jhzhao@red.semi.ac.cn
Received:
31
October
2009
Accepted:
9
March
2010
We report variations in structure and magnetic property of (Ga,Cr)As films with increasing Cr content x. Due to phase segregation, a tendency towards inhomogeneous distribution with increasing x is confirmed. Barkhausen-like magnetization and large remanent magnetic moment were also clearly observed in the samples with x < 5.3%. However, spin-glass–like behaviors were observed in both dc and ac magnetic measurements, which might originate from the competition between magnetic nucleation and frustration of long ferromagnetic order in this inhomogeneous system. All the samples exhibit characteristics of variable-range hopping conductivity at temperature below 150 K. Typical magnetic circular dichroism structure was observed in the sample with x = 7.9%.
PACS: 75.50.Pp – Magnetic semiconductors / 75.10.Nr – Spin-glass and other random models / 61.05.cj – X-ray absorption spectroscopy: EXAFS, NEXAFS, XANES, etc.
© EPLA, 2010
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.