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Ab initio study of biquadratic coupling in Fe/Cr multilayers (abstract)
Magnetic coupling in multilayer materials is a fascinating phenomenon that manifests itself in a wide range of effects, including novel magnetic arrangements and anomalous transport properties. We emp...
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Orientation dependence of coupling and interlayer moments in Fe/Cr multilayers (abstract)
The relationship between interlayer coupling and interlayer d-electron magnetic moments is studied using magnetometry and x-ray magnetic circular dichroism in Fe/Cr multilayers. Multilayers are simult...

Temperature dependence of noncollinear magnetic coupling in Fe/Cr(001) superlattices

J. Appl. Phys. 81, 3765 (1997); doi:10.1063/1.365501

Issue Date: 15 April 1997

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J. F. Ankner and H. Kaiser
Missouri University Research Reactor, Columbia, Missouri

A. Schreyer, Th. Zeidler, and H. Zabel
Ruhr Universität Bochum, Bochum, Germany

M. Schäfer and P. Grünberg
Forschungszentrum Jülich, Jülich, Germany
Using polarized-neutron reflectivity, we have measured the temperature dependence of the noncollinear magnetic coupling of ferromagnetic iron across chromium interlayers in two superlattice samples. The first sample, (52 Å Fe/17 Å Cr)9, exhibits a room temperature remanent magnetic structure consisting of successive Fe layer moments aligned at 50° relative to each other. This magnetic structure remains unchanged upon cooling the sample to 42 K. In contrast, a superlattice with a thicker Cr interlayer, [44 Å Fe/88 Å Cr]30, passes in a 20 K-wide transition centered on TN = 240 K from a room temperature state with Fe moments aligned at 90° to an uncoupled state. The formation of the incommensurate Cr spin density wave state below TN suppresses the interlayer coupling. The thinner Cr interlayers do not undergo a transition to this bulk structure, hence exhibit no suppression of coupling. In both samples, the coupling strength decreases for temperatures at and above room temperature. ©1997 American Institute of Physics.
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KEYWORDS and PACS

Keywords
PACS
  • 75.70.Cn
    Magnetic properties and materials Magnetic films and multilayers Interfacial magnetic properties (multilayers, magnetic quantum wells, superlattices, magnetic heterostructures)
  • 75.25.+z
    Magnetic properties and materials Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)
  • 75.60.Ej
    Magnetic properties and materials Domain effects, magnetization curves, and hysteresis Magnetization curves, hysteresis, Barkhausen and related effects
  • 75.30.Fv
    Magnetic properties and materials Intrinsic properties of magnetically ordered materials Spin-density waves
  • 75.30.Cr
    Magnetic properties and materials Intrinsic properties of magnetically ordered materials Saturation moments and magnetic susceptibilities
  • 75.50.Bb
    Magnetic properties and materials Studies of specific magnetic materials Fe and its alloys
  • 75.30.Kz
    Magnetic properties and materials Intrinsic properties of magnetically ordered materials Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
  • YEAR: 1996-97

PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (18)
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