[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.