Volume 34, Number 7, June I 1996
|Page(s)||537 - 542|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Spin wave excitations of Nd in Nd2CuO4
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
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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