A study of the induced magnetism in the Au spacer layer of Co/Au/CoO exchange-bias trilayers and related systems

  • M. Gierlings
  • M. J. Prandolini
  • M. Gruyters
  • T. Funk
  • D. Riegel
  • W. D. Brewer
Surfaces and Interfaces


We report the first observation of the effects of exchange bias on the nuclear spin polarization and induced magnetic moments at a magnetic/non-magnetic interface, applying low temperature nuclear orientation (LTNO) to Co/Au(x)/CoO trilayer systems. This technique allows us to determine simultaneously the average alignment of the nuclear moments for the two radioactive probe isotopes 198Au and 60Co with respect to an external magnetic field axis. The total average Au γ-ray anisotropy measured was found (i) to decrease with increasing Au thickness, indicating that large hyperfine fields are restricted to the interfacial Au layers and (ii) to be canted away from the applied field axis even when the Co layers are magnetically saturated. This canting was found to originate at the CoO/Au interface as could be shown from comparative measurements on CoO/Au/CoO trilayers containing two AFM CoO/Au interfaces and on a Co/Au/Co trilayer with two FM Co/Au interfaces. In the case of CoO/Au/CoO, the observed canting was found to be dependent on the Au layer thickness.


Hyperfine Field Exchange Bias Field Axis Magnetic Field Axis Nuclear Orientation 
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  1. P. Grünberg, R. Schreiber, Y. Pang, M.B. Brodsky, H. Sowers, Phys. Rev. Lett. 57, 2442 (1986) CrossRefPubMedGoogle Scholar
  2. N.J. Gökemeijer, T. Ambrose, C.L. Chien, Phys. Rev. Lett. 79, 4270 (1997) CrossRefGoogle Scholar
  3. W.H. Meiklejohn, C.P. Bean, Phys. Rev. 102, 1413 (1956) CrossRefGoogle Scholar
  4. J. Nogués, I.K. Schuller, J. Magn. Magn. Mater. 192, 203 (1999) CrossRefGoogle Scholar
  5. T. Mewes, B.F.P. Roos, S.O. Demokritov, B. Hillebrands, J. Appl. Phys. 87, 5064 (2000) CrossRefGoogle Scholar
  6. L. Thomas, A.J. Kellock, S.S.P. Parkin, J. Appl. Phys. 87, 5061 (2000) CrossRefGoogle Scholar
  7. M. Gruyters, M. Gierlings, D. Riegel, Phys. Rev. B 64, 132401 (2001) CrossRefGoogle Scholar
  8. M. Nývlt, T. Katayama, Y. Suzuki, S. Yuasa, J. Franta, Š. Višňovsky, 16th ICMFS, Natal, edited by M.N. Baibich, A.B. Antunes (Instituto de Física UFRGS, 2000), p. 216 Google Scholar
  9. K. Inagawa, K. Kamigaki, S. Miura, J. Phys. Soc. Jpn 31, 1276 (1971) Google Scholar
  10. N.J. Stone, H. Postma, Low Temperature Nuclear Orientation (Elsevier Science, 1986) Google Scholar
  11. S. Ohnishi, M. Weinert, A.J. Freeman, Phys. Rev. B 30, 36 (1984) CrossRefGoogle Scholar
  12. T. Phalet, M.J. Prandolini, W.D. Brewer, P. De Moor, P. Schuurmans, N. Severijns, B.G. Turrell, A. Van Geert, B. Vereecke, S. Versyck, Phys. Rev. Lett. 86, 902 (2001) CrossRefPubMedGoogle Scholar
  13. B.-U. Runge, M. Dippel, G. Filleböck, K. Jacobs, U. Kohl, G. Schatz, Phys. Rev. Lett. 79, 3054 (1997). CrossRefGoogle Scholar
  14. Y. Kobayashi, S. Nasu, T. Emoto, T. Shinjo, Hyp. Int. 94, 2273 (1994) Google Scholar
  15. F. Wilhelm, P. Poulopoulos, G. Ceballos, H. Wende, K. Baberschke, P. Srivastava, D. Benea, H. Ebert, M. Angelakeris, N.K. Flevaris, D. Niarchos, A. Rogalev, N.B. Brookes, Phys. Rev. Lett. 85, 413 (2000) CrossRefPubMedGoogle Scholar
  16. H. Luetkens, J. Korecki, E. Morenzoni, T. Prokscha, M. Birke, H. Glückler, R. Khasanov, H.-H. Klauss, T. Ślezak, A. Suter, E.M. Forgan, Ch. Niedermayer, F.J. Litterst, Phys. Rev. Lett. 91, 017204 (2003) CrossRefPubMedGoogle Scholar
  17. M. Gruyters, D. Riegel, Phys. Rev. B 63, 052401 (2001) CrossRefGoogle Scholar
  18. M. Gruyters, D. Riegel, J. Appl. Phys. 88, 6610 (2000) CrossRefGoogle Scholar
  19. P. Miltényi, M. Gierlings, M. Bamming, U. May, G. Güntherodt, J. Nogués, M. Gruyters, C. Leighton, I.K. Schuller, Appl. Phys. Lett. 75, 2304 (1999) CrossRefGoogle Scholar
  20. K. Okada, H. Yasuoka, J. Phys. Soc. Jpn 43, 34 (1977) Google Scholar
  21. K. Motizuki, J. Phys. Soc. Jpn 15, 888 (1960) Google Scholar
  22. V. Jaccarino, Magnetism 2A, edited by G.T. Rado, H. Suhl, (Academic Press, New York, 1965) Google Scholar
  23. M. Le Gros, A. Kotlicki, B.G. Turrell, Hyp. Int. 77, 203 (1993) Google Scholar
  24. K.-H. Ebeling, R. Eder, E. Hagn, E. Zech, M. Deicher, Z. Naturforsch. a 41, 95 (1986) Google Scholar
  25. N. Marsot, R. Belkhou, F. Scheurer, B. Bartenlian, N. Barrett, M.A. Delaunay, C. Guillot, Surf. Sci. 377-379, 225 (1997) Google Scholar
  26. M. Speckmann, H.P. Oepen, H. Ibach, Phys. Rev. Lett. 75, 2035 (1995) CrossRefPubMedGoogle Scholar
  27. E. Zech, E. Hagn, H. Ernst, G. Eska, Hyp. Int. 4, 342 (1978) CrossRefGoogle Scholar
  28. M. Gierlings, M.J. Prandolini, H. Fritzsche, M. Gruyters, D. Riegel, Phys. Rev. B 65, 092407 (2002) CrossRefGoogle Scholar
  29. J.H. Greiner, A.E. Berkowitz, J.E. Weidenborner, J. Appl. Phys. 37, 2149 (1966) CrossRefGoogle Scholar
  30. T. Ambrose, C.L. Chien, Phys. Rev. Lett. 76, 1743 (1996) CrossRefPubMedGoogle Scholar
  31. M. Gierlings, Ph.D. Dissertation, Freie Universität Berlin, (2002) Google Scholar
  32. H. Ohldag, T.J. Regan, J. Stöhr, A. Scholl, F. Nolting, J. Lüning, C. Stamm, S. Anders, R.L. White, Phys. Rev. Lett. 87, 247201 (2001) CrossRefPubMedGoogle Scholar
  33. M.D. Stiles, R.D. McMichael, Phys. Rev. B 59, 3722 (1999) CrossRefGoogle Scholar

Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Authors and Affiliations

  • M. Gierlings
    • 1
  • M. J. Prandolini
    • 1
    • 2
  • M. Gruyters
    • 3
  • T. Funk
    • 4
  • D. Riegel
    • 1
  • W. D. Brewer
    • 2
  1. 1.Hahn-Meitner Institut BerlinGlienicker StrasseGermany
  2. 2.Institut für Experimentalphysik, Freie Universität BerlinBerlin-DahlemGermany
  3. 3.Humboldt-Universität zu Berlin, Institut für PhysikBerlinGermany
  4. 4.UCSFSan FranciscoUSA

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