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doi:10.1016/S0304-8853(00)00952-5
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Copyright © 2001 Elsevier Science B.V. All rights reserved.


    Low-frequency response in antiferromagnetically coupled Fe/Cr
    multilayers

F. G. AlievCorresponding Author Contact Information <#m4.cor*>, E-mail
The Corresponding Author <mailto:farkhad.aliev@uam.es>, a <#aff1>, R.
Guerreroa <#aff1>, J. L. Martinezb <#aff2>, V. V. Moshchalkovc <#aff3>,
Y. Bruynseraedec <#aff3> and R. Villara <#aff1>

a Dpto. de Fisica de la Materia Condensada, Instituto Ciencia de
Materiales ‘Nicolas Cabrera’, C -III, Universidad Autonoma de Madrid,
28049, Madrid, Spain
b ICMM, CSIC, Cantoblanco 28049, Madrid, Spain
c Laboratorium voor Vaste-Stoffysica en Magnetisme, K.U. Leuven, Belgium

Available online 14 November 2001.


    Abstract

We have studied the magnetic field dependences of the real (small chi,
Greek) and imaginary (small chi, Greek′) contributions to the
low-frequency magnetic susceptibility in epitaxial antiferromagnetically
coupled [Fe(Cr(1 0 0)]n (n=10–50) multilayers. For the magnetic field
directed along (1 1 0), the magnetic susceptibility shows on orientation
phase transition. For the magnetic field either along the easy or the
hard axes we observe a strong enhancement of the small chi, Greek′(H)
(i.e. magnetic losses) at low magnetic fields (H<50 Oe), which we relate
to AC field-induced domain wall movement. This response is strongly
dependent on frequency and temperature.

Author Keywords: Susceptibility—low field; Domain wall; Magnetic loss


    Article Outline

• References
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(9K)
Fig. 1. Real (part a) and imaginary (part b) contributions to the
magnetic susceptibility of [Fe(30 Å)/Cr(13.5 Å)]10 measured at 300 and
20 K by applying the AC drive amplitude of pp=4 Oe.

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Fig. 2. Magnetic field dependence of the real (a) and imaginary (b)
contributions to the magnetic susceptibility of [Fe(30 Å)/Cr(13.5 Å)] 10
at 60 and 5 K measured with pp=8 Oe.


    References

1. A. Fert, P. Grünberg, A. Barthèlemy, F. Petroff, W-Zinn, J. Magn.
Magn Matter 140–144 (1995) 1.

2. S. Rakhmanova, D.L. Mills and E.E. Fullerton. Phys. Rev. B 57 (1998),
p. 476. Abstract-INSPEC
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Corresponding Author Contact Information <#m4.bcor*> Corresponding
author. Tel.: +3413974756; fax: +2491-3973961; email:
farkhad.aliev@uam.es <mailto:farkhad.aliev@uam.es>



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