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Magnetic Order of Co0.1Pt0.9 in Proximity of CoPt3

Published online by Cambridge University Press:  10 February 2011

A.L. Shapiro
Affiliation:
University of California-San Diego, La Jolla, CA 92093
F. Hellman
Affiliation:
University of California-San Diego, La Jolla, CA 92093
M.R. Fitzsimmons
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545
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Abstract

A polarized neutron reflectometry study of the magnetization density depth profile of a Co0.1Pt0.9-CoPt3 bilayer film found evidence for an induced moment in the Co0.1Pt0.9 overlayer in close proximity to the CoPt3 underlayer. If the moment of Co in these films is that of the bulk, then the μpt = 0.09(1)μB in the overlayer, and μpt = 0.04(1)μB, in the underlayer. In addition, ferromagnetic order of the Co0.1Pt0.9 overlayer was observed 8K above Tc for the material in the bulk.

Type
Research Article
Copyright
Copyright © Materials Research Society 1998

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References

1. Falicov, L.M. et al. , J. Mater. Res., 5(6), 1299(1990).10.1557/JMR.1990.1299Google Scholar
2. Felcher, G.P., Hilleke, R.O., Crawford, R.K., Hanmann, J., Kleb, R. and Ostowski, G., Rev. Sci. Instrum. 58, 609 (1987).10.1063/1.1139225Google Scholar
3. Rooney, P.W., Shapiro, A.L., Tran, M.Q. and Hellman, F., Phys. Rev. Lett., 75(9), 1843 (1995).10.1103/PhysRevLett.75.1843Google Scholar
4. The roll-over of the X-ray reflectivity profile below Q is caused when the cross-section of the beam is larger than the cross-section of the sample. The reflectivity of the sample is still unity for Q<Qc, and the roll-over can be accounted for with a simple geometrical factor.Google Scholar
5. Parratt, L.G., Phys. Rev., 95, 359 (1954).10.1103/PhysRev.95.359Google Scholar
6. Fitzsimmons, M.R., Luett, M., Kinder, H. and Prusseit, W., accepted for publication in Nucl. Instrum. and Methods.Google Scholar
7. Dosch, H., Phys. Rev. B, 35(5), 2137 (1987).10.1103/PhysRevB.35.2137Google Scholar
8. Squires, G.L., Thermal Neutron Scattering, Dover Publications, New York, 1978, p. 7.Google Scholar
9. Hughes, D.J. and Burgy, M.T., Phys. Rev., 81(4), 498 (1951).10.1103/PhysRev.81.498Google Scholar
10. Chen, Chih-Wen, Magnetism and Metallurgy of Soft Magnetic Materials, Dover Publications, New York, 1986, p. 38.Google Scholar