We have performed ion channeling characterizations on the (001) and (100) surfaces of single crystals, using 950 keV ions at temperatures ranging from 20 to 780 °C. In oxygen pressures below we directly observed the surface changes as the sample temperature was increased, and found that the compositional and structural changes occurred from around 400 °C. At higher oxygen pressures, we heated the crystals and performed channeling analysis before and after the heating. We found that the crystal surfaces were stable at temperatures up to 780 °C in the oxygen pressure range of 1 mTorr–1 Torr. Beyond this range, the surfaces deteriorated at high temperatures.
REFERENCES
1.
R.
Beyers
, G.
Lim
, E. M.
Engler
, R. J.
Savoy
, T. M.
Shaw
, T. R.
Dinger
, W. J.
Gallagher
, and R. L.
Sandstrom
, Appl. Phys. Lett.
50
, 1918
(1987
).2.
I. K.
Schuller
, D. G.
Hinks
, M. A.
Beno
, D. W.
Capone
II, L.
Soderholm
, J. P.
Locquet
, Y.
Bruynserade
, C. U.
Segre
, and K.
Zhang
, Solid State Commun.
63
, 385
(1987
).3.
J. D.
Jorgensen
, M. A.
Beno
, D. G.
Hinks
, L.
Soderholm
, K. J.
Volin
, R. L.
Hitterman
, J. D.
Grace
, I. K.
Schuller
, C. U.
Segre
, K.
Zhang
, and M. S.
Kleefisch
, Phys. Rev. B
36
, 3608
(1987
).4.
W.-K. Chu, J. W. Mayer, and M.-A. Nicolet, Backscattering Spectrometry (Academic, New York, 1978).
5.
L. C. Feldman, J. W. Mayer, and S. T. Picraux, Materials Analysis by Ion Channeling (Academic, New York, 1982).
6.
R.
Feenstra
, T. B.
Lindemer
, J. D.
Budai
, and M. D.
Galloway
, J. Appl. Phys.
69
, 6569
(1991
).7.
B. T.
Ahn
, V. Y.
Lee
, R.
Beyers
, T. M.
Gur
, and R. A.
Huggins
, Physica C
167
, 529
(1990
).8.
J.
Karpinski
, S.
Rusiecki
, E.
Kaldis
, B.
Bucher
, and E.
Jilek
, Physica C
160
, 449
(1989
).9.
A. F.
Marshall
, R. W.
Barton
, K.
Char
, A.
Kalpitulnik
, and B.
Oh
, Phys. Rev. B
37
, 9353
(1988
).
This content is only available via PDF.
© 1997 American Institute of Physics.
1997
American Institute of Physics
You do not currently have access to this content.