Skip Main Navigation Links ScienceDirect Logo Skip Main Navigation Links Register or Login: Password: Home Browse Search Forms My Alerts My Profile Help (Opens new window) Quick Search: within Quick Search searches abstracts, titles, and keywords. Click for more information. 37 of 70 Result List Previous Next Physica B: Condensed Matter Volumes 267-268 , June 1999, Pages 207-210 This Document SummaryPlus Full Text + Links PDF (106 K) ------------------------------------------------------------------------ Actions Cited By Save as Citation Alert Export Citation PII: S0921-4526(99)00068-X Copyright © 1999 Published by Elsevier Science B.V. All rights reserved. Investigation of magnetic coupling phenomena in Fe1-xCrx/Cr-superlattices with spin-polarized neutrons R. SiebrechtCorresponding Author Contact Information <#m4.cor*>, E-mail The Corresponding Author , a <#orfa>, b <#orfb>, A. Schreyera <#orfa>, c <#orfc>, T. Schmittea <#orfa>, W. Schmidtb <#orfb> and H. Zabela <#orfa> a Institut für Festkörperphysik, Ruhr-Universität Bochum, 44780 Bochum, Germany b Institut Laue¯Langevin, 38042 Grenoble cedex 9, France c NIST Center for Neutron Research, Gaithersburg, MD 20899, USA Available online 10 January 2000. Abstract We present the results of temperature dependent measurements of magnetically coupled Fe1-xCrx/Cr-superlattices. These results are supplementary to the ones known for non-collinearly coupled Fe/Cr-superlattices. By systematically varying the Cr concentration x we cover a wide range of the Fe1-xCrx-phase diagram. As an experimental technique spin-polarized neutron reflectivity with spin analysis and high-angle neutron scattering proves to be ideal for this work. Author Keywords: Magnetic exchange coupling; Curie temperature; Néel temperature; Neutron reflectivity Article Outline 1. Introduction 2. Samples 3. Experimental 4. Results 5. Conclusions Acknowledgements References Enlarge Image (22K) Fig. 1. Reflectivity measurement with spin-polarized neutrons and spin analysis at T=35 K for a Fe0.43Cr0.57/Cr sample. The half order Bragg peak in R+-(=R-+) and no intensity splitting at the chemical first order Bragg peak position in R++ and R-- indicate an AFM coupling perpendicular to the neutron polarisation axis. The high intensity in R++ and R-- at the half order position is related to a high diffuse magnetic scattering which was confirmed with off specular scans. The inset documents the magnetic reorientation from AFM to FM by its temperature-dependent splitting. For more details see text. Table 1. List of [Cr/Fe1-xCrx]N/Cr/Nb/(1 Not-found 0 2)Al2O3 samples with systematic variation of the Cr concentration x. The samples were grown under equivalent conditions by molecular beam epitaxy. The spacer layer thicknesses, tCr<45 Å, was chosen to assure a commensurate AF spin structure. The large number of superlattice periods increases the amount of Cr which improves the signal to background ratio in neutron scattering experiments. The measured Curie temperatures for samples with higher concentrations are considerably lower than the bulk values View Table (<1K) References 1. P. Grünberg et al.. Phys Rev. Lett. 57 (1986), p. 2442. Abstract-INSPEC | $Order Document 2. M. Rührig et al.. Phys. Stat. Sol. (a) 125 (1991), p. 635. Abstract-INSPEC | $Order Document 3. B. Heinrich et al.. Phys. Rev. B 44 (1991), p. 9348. Abstract-INSPEC | $Order Document | Full Text via CrossRef 4. E. Fawcett. Rev. Mod. Phys. 60 (1988), p. 209. Abstract-INSPEC | $Order Document | Full Text via CrossRef 5. J. Unguris, R.J. Cellotta and D.T. Pierce. Phys. Rev. Lett. 67 (1991), p. 140. Abstract-INSPEC | $Order Document | Full Text via CrossRef 6. D. Stoeffler and F. Gautier. J. Magn. Magn. Mater. 121 (1993), p. 259. Abstract-INSPEC | $Order Document 7. A. Schreyer, C.F. Majkrzak, Th. Zeidler, T. Schmitte, P. Bödeker, K. Theis-Bröhl, A. Abromeit, J.A. Dura and T. Watanabe. Phys. Rev. Lett. 79 (1997), p. 4914. Abstract-INSPEC | $Order Document | APS full text | Full Text via CrossRef 8. E.E. Fullerton, S.D. Bader and J.L. Robertson. Phys. Rev. Lett. 77 (1996), p. 1382. Abstract-INSPEC | Abstract-Compendex | $Order Document | APS full text | Full Text via CrossRef 9. J.C. Slonczewski. J. Magn. Magn. Mater. 150 (1995), p. 13. Abstract | PDF (858 K) 10. Landolt Börnstein, New Series III/19a, 1986, p. 338, 342.. 11. J.A. Wolf, Q. Leng, R. Schreiber, P.A. Grünberg and W. Zinn. J. Magn. Magn. Mater. 121 (1993), p. 253. Abstract-INSPEC | $Order Document 12. A. Schreyer et al.. Europhys. Lett. 32 (1995), p. 595. Abstract-INSPEC | $Order Document 13. A. Schreyer et al.. Europhys. Phys. Rev. B 52 (1995), p. 16066. Abstract-INSPEC | $Order Document | Full Text via CrossRef 14. C.F. Majkrzak, J.W. Cable, J. Kwo, M. Hong, D.B. McWhan, Y. Yafet, J.V. Waszczak and C. Vettier. Phys. Rev. Lett. 56 (1986), p. 2700. Abstract-INSPEC | $Order Document | Full Text via CrossRef 15. S. J Blundell and J.A.C. Bland. Phys. Rev. B 46 (1992), p. 3391. 16. H. Zabel. Appl. Phys. A 58 (1994), p. 159. Abstract-Compendex | Abstract-INSPEC | $Order Document 17. G.P. Felcher, R.O. Hilleke, R.K. Crawford, J. Hauman, R. Kleb and G. Ostrowski. Rev. Sci. Instrum. 58 (1987), p. 609. Abstract-INSPEC | $Order Document | Full Text via CrossRef 18. N.K. Pleshanov. Z. Phys. B 94 (1994), p. 233. Abstract-INSPEC | $Order Document 19. R. Siebrecht, A. Schreyer, U. Englisch, U. Pietsch and H. Zabel. Physica B 241¯243 (1998), p. 169. Corresponding Author Contact Information <#m4.bcor*> Correspondence address: Institut Laue¯Langevin, 38042 Grenoble cedex 9, France. Tel.: +33-4-76-20-75-89; fax: +33-4-76-20-71-20; email: siebrech@ill.fr This Document SummaryPlus Full Text + Links PDF (106 K) ------------------------------------------------------------------------ Actions Cited By Save as Citation Alert Export Citation Physica B: Condensed Matter Volumes 267-268 , June 1999, Pages 207-210 37 of 70 Result List Previous Next Home Browse Search Forms My Alerts My Profile Help (Opens new window) ScienceDirect Logo Send feedback to ScienceDirect Software and compilation © 2002 ScienceDirect. All rights reserved. ScienceDirect® is an Elsevier Science B.V. registered trademark. Your use of this service is governed by Terms and Conditions . Please review our Privacy Policy for details on how we protect information that you supply.