We report experimental results on the ferromagnetic critical behavior of cobalt and metastable cobalt‐copper alloy two‐dimensional layers CuxCo1−x epitaxially grown on Cu(001). Copper alloying reduces the magnitude of the cobalt magnetic moment and introduces a magnetization component normal to the film. Reorientation of the magnetization back into the plane occurs via a second‐order phase transition at a temperature which is lower than the film Curie temperature. We discuss these results in light of the recent predictions of Pescia and Pokrovsky.
REFERENCES
1.
D.
Pescia
and V. L.
Pokrovsky
, Phys. Rev. Lett.
65
, 2599
(1990
).2.
G. J. Mankey, M. T. Kief, and R. F. Willis, Proceedings of the 37th AVS Conference, Toronto, Oct. 1990, J. Vac. Sci. Technol. (in press).
3.
M. T. Kief, G. J. Mankey, and R. F. Willis, Proceedings of the 35th MMM Conference, San Diego, Nov. 1990, J. Appl. Phys. (in press).
4.
5.
M. T. Kief, G. J. Mankey, and R. F. Willis (to be published).
6.
D. L.
Connelly
, J. S.
Loomis
, and D. E.
Mapother
, Phys. Rev. B
3
, 924
(1971
).7.
W.
Dürr
, M.
Taborelli
, O.
Paul
, R.
Germar
, W.
Gudat
, D.
Pescia
, and M.
Landolt
, Phys. Rev. Lett.
62
, 206
(1989
).8.
9.
Generally the polar Kerr signal is expected to be several times stronger than the longitudinal Kerr signal. Therefore it is interesting that the cobalt-copper alloys have a polar Kerr signal which is reproducibly smaller. We believe that the perpendicular signal arises from a canting of the predominantly in-plane magnetization and results from hybridization of the copper-cobalt states. This interpretation is based upon observations of a similar weak perpendicular signal in copper coated Co/Cu(001) films which originates from canting (Ref. 5).
10.
S. O.
Demokritz
, M. M.
Kreines
, V. I.
Kudinov
, and S. V.
Detra
, Zh. Eksp. Teor. Fiz.
95
, 211
(1989
)[
S. O.
Demokritz
, M. M.
Kreines
, V. I.
Kudinov
, and S. V.
Detra
, Sov. Phys. JETP
68
, 1277
(1989
)].11.
D. P.
Pappas
, K. P.
Kämper
, and H.
Hopster
, Phys. Rev. Lett.
64
, 3179
(1990
).12.
W.
Schwarzacher
, W.
Allison
, R. F.
Willis
, J.
Penfold
, R. C.
Ward
, I.
Jacob
, and W. F.
Egelhoff
, Jr., Solid State Commun.
71
, 563
(1989
).13.
W. A. A.
Macedo
and W.
Keune
, Phys. Rev. Lett.
61
, 475
(1988
).14.
This content is only available via PDF.
© 1991 American Institute of Physics.
1991
American Institute of Physics
You do not currently have access to this content.
