Phys. Rev. Lett. Phys. Rev. A Phys. Rev. B Phys. Rev. C Phys. Rev. D Phys. Rev. E Phys. Rev. ST AB Phys. Rev. ST AB Rev. Mod. Phys. Phys. Rev. (Series I) Phys. Rev. Volume: Page/Article:

Phys. Rev. Lett. 86, 5597–5600 (2001)

[Issue 24 – 11 June 2001 ]

[ Previous article | Next article | Issue 24 contents ]

Perpendicular Spin Orientation in Ultrasmall Fe Islands on W(110)

R. Röhlsberger¹, J. Bansmann¹, V. Senz¹, K. L. Jonas¹, A. Bettac¹, O. Leupold², R. Rüffer², E. Burkel¹, and K. H. Meiwes-Broer¹

¹Universität Rostock, Fachbereich Physik, Universitätsplatz 3, 18055 Rostock, Germany

²European Synchrotron Radiation Facility, B.P. 220, 38043 Grenoble Cedex, France

We have studied the magnetism of Ag-coated Fe islands on W(110) by nuclear resonant scattering of synchrotron radiation at the 14.4 keV resonance of ⁵⁷Fe. Separated islands with an average diameter of 2.0 nm and monolayer thickness are formed at a Fe coverage of theta = 0.57 bulk monolayers. Time spectra of the nuclear decay were measured in the temperature range from 4.5 to 300 K. We find strong evidence for perpendicular spin orientation, which most likely results from the interplay of shape anisotropy and elastic strain in the islands.

©2001 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v86/p5597
DOI: 10.1103/PhysRevLett.86.5597
PACS: 75.70.Ak, 76.80.+y

[ Previous article | Next article | Issue 24 contents ]

References

1. F. J. Himpsel, J. E. Ortega, G. J. Mankey, and R. F. Willis, Adv. Phys. 47, 511 (1998) [CAS][ INSPEC].
2. Metal Clusters at Surfaces, edited by K. H. Meiwes-Broer (Springer, Berlin,2000).
3. Ultrathin Magnetic Structures, edited by J. A. C. Bland and B. Heinrich (Springer, Berlin,1994), Vols. I and II.
4. U. Gradmann, in Handbook of Magnetic Materials, edited by K. H. J. Buschow (Elsevier, Amsterdam,1993), Vol. 7.
5. M. Przybylski and U. Gradmann, Phys. Rev. Lett. 59, 1152 (1987).
6. M. Przybylski, I. Kaufmann, and U. Gradmann, Phys. Rev. B 40, 8631 (1989); M. Przybylski, Hyperfine Interact. 113, 135 (1998) [CAS][ INSPEC].
7. W. Weber, D. Kerkmann, D. Pescia, D. A. Wesner, and G. Güntherodt, Phys. Rev. Lett. 65, 2058 (1990).
8. H. J. Elmers, J. Hauschild, and U. Gradmann, Phys. Rev. B 54, 15 224 (1996).
9. H. J. Elmers, G. Liu, and U. Gradmann, Phys. Rev. Lett. 63, 566 (1989).
10. M. Getzlaff, J. Bansmann, J. Braun, and G. Schönhense, Z. Phys. B 104, 11 (1997) [CAS].
11. U. Gradmann, J. Korecki, and G. Waller, Appl. Phys. A 39, 101 (1986).
12. M. Przybylski and U. Gradmann, J. Phys. C 8, 1705 (1988) [ INSPEC].
13. H. J. Elmers, J. Hauschild, H. Höche, U. Gradmann, H. Bethge, D. Heuer, and U. Köhler, Phys. Rev. Lett. 73, 898 (1994).
14. W. Sturhahn and E. Gerdau, Phys. Rev. B 49, 9285 (1994).
15. L. Niesen, A. Mugarza, M. F. Rosu, R. Coehoorn, R. M. Jungblut, F. Roozeboom, A. Q. R. Baron, A. I. Chumakov, and R. Rüffer, Phys. Rev. B 58, 8590 (1998).
16. R. Rüffer and A. I. Chumakov, Hyperfine Interact. 97/98, 589 (1996).
17. A derivation of Eq. 1 will be given in a separate publication.
18. U. van Bürck, D. P. Siddons, J. B. Hastings, U. Bergmann, and R. Hollatz, Phys. Rev. B 46, 6207 (1992).
19. S. W. Lovesey and S. P. Collins, X-ray Scattering and Absorption by Magnetic Materials (Clarendon Press, Oxford,1996), p. 180.
20. R. Röhlsberger, Hyperfine Interact. 123/124, 455 (1999).
21. C. P. Bean and J. D. Livingston, J. Appl. Phys. 30, 120S (1959) [CAS].
22. J. G. Gay and R. Richter, Phys. Rev. Lett. 56, 2728 (1986).
23. Y. Park, S. Adenwalla, G. P. Felcher, and S. D. Bader, Phys. Rev. B 52, 12 779 (1995); F. Bødker, S. Mørup, and S. Linderoth, Phys. Rev. Lett. 72, 282 (1994).
24. A. Q. R. Baron, A. I. Chumakov, H. F. Grünsteudel, H. Grünsteudel, L. Niesen, and R. Rüffer, Phys. Rev. Lett. 77, 4808 (1996).
25. A. Enders, D. Sander, and J. Kirschner, J. Appl. Phys. 85, 5279 (1999) [ADS][CAS][ SPIN][ INSPEC].
26. N. Weber, K. Wagner, H. J. Elmers, J. Hauschild, and U. Gradmann, Phys. Rev. B 55, 14 121 (1997).
27. D. Sander, R. Skomski, A. Enders, C. Schmidthals, D. Reuter, and J. Kirschner, J. Phys. D 31, 663 (1998) [ADS][CAS][ INSPEC]; D. Sander, A. Enders, and J. Kirschner, Europhys. Lett. 45, 208 (1999) [CAS][ INSPEC]; D. Sander, Rep. Prog. Phys. 62, 809 (1999) [ADS][CAS][ INSPEC].
28. S. C. Hong, A. J. Freeman, and C. L. Fu, Phys. Rev. B 38, 12 156 (1988).
29. H. J. Elmers and U. Gradmann, Surf. Sci. 304, 201 (1994) [CAS][ INSPEC].

[ Previous article | Next article | Issue 24 contents ]