Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: C1.00145 : Initial growth of CrAs on GaAs(001)-c(4$\times$4)$\alpha$
Author:
CrAs is a ferromagnetic material which has a hexagonal structure.
It is, however, predicted by first-principles calculation that
zincblende (ZB) CrAs shows ferromagnetism and has a halfmetaric
electronic structure [1-3]. Although ferromagnetism of a CrAs
epitaxial film was confirmed so far, its crystal structure is
still unclear. It turned out that ferromagnetism originated at
the interface.
In this study, initial growth of CrAs film has been investigated
with scanning tunneling microscopy at 80 K. CrAs was grown on a
GaAs(001)-c(4$\times$4)$\alpha$ surface by means of exposing Cr as
well as As$_4$ atoms at 250$^{\circ}$ C, followed by annealing at
the same temperature. Randomly grown CrAs islands were observed
form larger islands in proportion to the annealing time. Dimer
structure which is similar to that of the substrate was confirmed
on the surface of CrAs islands. This means that a CrAs island may
have a ZB structure. The detailed structure and electric state of
CrAs islands are discussed in the presentation.
\\[4pt]
[1] H. Akinaga et al., Jpn. J. Appl. Phys. 39 (2000) L1118
\\[0pt]
[2] M. Shirai, Physica E 10 (2001) 143
\\[0pt]
[3] A. Sakuma, J. Phys. Soc. Jpn. 71 (2002) 2534
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.C1.145
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2021 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
1 Research Road, Ridge, NY 11961-2701
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700