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Dynamics of Frustrated Magnetic Moments in Antiferromagnetically Ordered TbNiAl Probed by Spin Echo and Time-of-Flight Spectroscopy

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Neutron Spin Echo Spectroscopy

Part of the book series: Lecture Notes in Physics ((LNP,volume 601))

Abstract

In this contribution we present a combined study of the dynamics of frustrated Tb spins in the intermetallic compound TbNiAl by means of neutron time-of-flight and spin echo spectroscopy. It is a remarkable and very unusual characteristic of TbNiAl that its afm phase (below T N = 47 K) contains regular long-range ordered spins as well as frustrated spins. The latter are identified by a strongly reduced moment measured by neutron diffraction. Our quasielastic measurements show that the frustrated moments relax on a time scale of 0.01 ns to 0.1 ns. Their auto-correlation function I(Q, t) is Q-independent and exponential in time.

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Authors and Affiliations

  1. Institut Laue Langevin, 6 rue Jules Horowitz, 38042, Grenoble Cedex 9, France

    G. Ehlers & H. Casalta

  2. Hahn-Meitner-Institut Berlin, Glienicker Str. 100, 14109, Berlin, Germany

    R. E. Lechner & H. Maletta

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  1. G. Ehlers
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  2. H. Casalta
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  3. R. E. Lechner
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  4. H. Maletta
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Editors and Affiliations

  1. Hahn-Meitner-Institut Berlin, Glienicker Str. 100, 14109, Berlin, Germany

    Ferenc Mezei  & Catherine Pappas  & 

  2. Laboratory for Neutron Scattering, Paul Scherrer Institut, 5232, Villigen PSI, Switzerland

    Thomas Gutberlet

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© 2002 Springer-Verlag Berlin Heidelberg

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Ehlers, G., Casalta, H., Lechner, R.E., Maletta, H. (2002). Dynamics of Frustrated Magnetic Moments in Antiferromagnetically Ordered TbNiAl Probed by Spin Echo and Time-of-Flight Spectroscopy. In: Mezei, F., Pappas, C., Gutberlet, T. (eds) Neutron Spin Echo Spectroscopy. Lecture Notes in Physics, vol 601. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45823-9_18

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  • DOI: https://doi.org/10.1007/3-540-45823-9_18

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-44293-6

  • Online ISBN: 978-3-540-45823-4

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