[Image][Image][Image] [Image] [Image] [Image] [Image][Image] Subject View: [Image][Image][Image] [Image][Image] [Image] [Image][Image][Image] [Image] [Home][Image][Publications][Image][Search][Image][My Alerts][Image][My Profile][Image][Help] [Image] Quick Search: within [Image] [Image][Quick Search searches abstracts, titles, and keywords. Click for more information.] [Image] 6 of 39 [Result List][Previous][Next] Journal of Magnetism and Magnetic Materials Volume 145, Issues 1-2 March 1995 Pages 57-66 ------------------------------------------------ 0304-8853(94)00408-J Mössbauer spectroscopy of Cr(110)/Fe(110)/Cr(110) sandwiches U. Gradmanna, *, J. Zukrowskia, b, G. Liua and H. Fritzschea a Physikalisches Institut, Technische Universität Clausthal D 38678 Clausthal-Zellerfeld Germany b Department of Solid State Physics FPNT, Academy of Mining and Metallurgy 30-059 Cracow Poland Received 10 June 1994; revised 3 October 1994. Available online 22 December 1999. Abstract Magnetic order in ultrathin Fe(110) films in a Cr(110) matrix and its temperature dependence were analyzed using conversion electron Mössbauer spectroscopy (CEMS). The samples were characterized by flat interfaces, as tested by SPA-LEED (spot profile analysis LEED). Fe films consisting of D atomic layers with 1[Image]D[Image]31 were doped by e57Fe probes and analyzed using CEMS in situ in UHV, for 100 K[Image]T[Image]450 K. All spectra could be fitted by Zeeman sextets with Bhf(T) following Bloch laws. For films with 2[Image]D[Image]6, the first Fe layer in the CrFe interface shows a reduced ground state hyperfine field of Bs(0) = 25.8 T, which differs from values determined previously for rough interfaces. It agrees roughly with the predictions from an alloy model. Spin-wave parameters are reduced in comparison with samples W(110)/Fe/Ag. For thicker films (D>6), two subcomponents of the interface can be distinguished, with equal abundance, but different hyperfine fields and different b parameters; apparently they belong to two magnetically inequivalent states resulting from the antiferromagnetic order in Cr. Extraordinary low values for the surface enhancement of the b parameters, [Image]s,a = 1.5 and [Image]s,b = 1.1, respectively, and a large value of 10 atomic distances for the interaction length are explained by the antiferromagnetic order of the matrix. The low values for the surface enhancement of the spin-wave parameters differ strongly from results reported for the case of rough interfaces. For the double layer, a break of Bhf(T) was observed near the Néel temperature of Cr. Parameters of the monolayer could be roughly determined. *Corresponding author. Journal of Magnetism and Magnetic Materials This document Volume 145, Issues 1-2 Abstract March 1995 Journal Format-PDF (750 Pages 57-66 K) ----------------------------- Actions Cited By Save as Citation Alert Export Citation 6 of 39 [Result List][Previous][Next] [Image] [Home][Image][Publications][Image][Search][Image][My Alerts][Image][My Profile][Image][Help] [Image] 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.