| Issue |
Europhys. Lett.
Volume 34, Number 7, June I 1996
|
|
|---|---|---|
| Page(s) | 537 - 542 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1996-00491-5 | |
| Published online | 01 September 2002 | |
Spin wave excitations of Nd in Nd2CuO4
1
Institut Laue-Langevin -B.P.156 X, 38042 Grenoble Cedex, France
2
Max-Planck-Institut für Physik komplexer Systeme - Dresden,
Germany
3
Hahn-Meitner-Institut - Glienecker Str. 100, D14109 Berlin,
Germany
4
Laboratory for Neutron Scattering, Eidg. Technische
Hochschule Zürich, Paul Scherrer Institut - CH-5232 Villigen PSI,
Switzerland
Received:
16
January
1996
Accepted:
11
April
1996
We performed inelastic-neutron-scattering experiments to determine the
dispersion of the Nd spin wave excitations in 
. The results were
analysed with the help of a random phase approximation model calculation. We
were able to find a set of exchange interactions that describes both the
observed energies and the intensities of the excitations. Our result indicates
that the interaction of the Nd spins is opposed to the ordering enforced by the
Nd-Cu exchange. We argue that this will lead to an instability of the Nd ordering
in the Ce-doped systems which might be important for the onset of high γ-values.
PACS: 75.30.Ds – Spin waves / 74.72.-h – High-Tc cuprates
© EDP Sciences, 1996
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