Issue |
Europhys. Lett.
Volume 46, Number 6, June II 1999
|
|
---|---|---|
Page(s) | 801 - 807 | |
Section | Condensed matter: electronic structure, electrical, magneticand optical properties | |
DOI | https://doi.org/10.1209/epl/i1999-00335-x | |
Published online | 01 December 2003 |
Low-energy magnetic excitations in double-layered manganite
1
Institut Laue-Langevin, BP 156 - 38042 Grenoble Cedex 9, France
2
Max-Planck-Institut für Physik Komplexer Systeme - Dresden,
Germany
3
Max-Planck-Institut für Chemische Physik fester Stoffe - Dresden,
Germany
4
Technische Universität Darmstadt - Darmstadt, Germany
5
Laboratoire de Chemie des Solides UA446, CNRS, Université Paris XI Bat-414, 91405
Orsay, France
Received:
28
September
1998
Accepted:
15
April
1999
We have investigated the magnetic correlations and low-energy magnetic excitations in a layered manganite which shows colossal magnetoresistance (CMR) behaviour. Our results confirm the coexistence of both ferromagnetic and antiferromagnetic correlations above . In addition we have discovered dispersive low-energy magnetic excitations of energy of 0.1–0.4 meV propagating along [001] in the ferromagnetic phase below TC which we have analyzed within an effective exchange model of weakly coupled ferromagnetic double layers.
PACS: 75.30.Ds – Spin waves / 75.25.+z – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.) / 72.15.Gd – Galvanomagnetic and other magnetotransport effects
© EDP Sciences, 1999
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