NEW SPIN-WAVE BRANCH INDUCED BY THE HOLE DOPING IN LA1-XCAXMNO3

Authors
HENNION M MOUSSA F RODRIGUEZCARVAJAL J PINSARD L REVCOLEVSCHI A
Citation
M. Hennion et al., NEW SPIN-WAVE BRANCH INDUCED BY THE HOLE DOPING IN LA1-XCAXMNO3, Journal of magnetism and magnetic materials, 177, 1998, pp. 858-859
Citations number
5
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Journal of magnetism and magnetic materials → ACNP
ISSN journal
03048853
Volume
177
Year of publication
1998
Part
2
Pages
858 - 859
Database
ISI
SICI code
0304-8853(1998)177:<858:NSBIBT>2.0.ZU;2-6
Abstract
Measurements of spin waves in La1-xCaxMnO3, x = 0.08, T = 14 K, are re ported and compared to x = 0.05. Two spin-wave branches are observed, one showing the characteristics expected for Mn spins coupled by excha nge (strongly anisotropic), the other for hin spins coupled through ho le hopping (isotropic, with a quadratic law omega = Dq(2) + Delta at s mall q). Both spin-wave branches evolve with x. These two types of exc itations are separated by an energy band which does not vary with x. ( C) 1998 Elsevier Science B.V. All rights reserved.