Articles written in Pramana – Journal of Physics
Volume 63 Issue 1 July 2004 pp 143-153
The results of inelastic and quasi-elastic neutron scattering investigations on the 40% hole-doped quasi-2D bilayer manganites La1.2Sr1.8Mn2O7 have been reviewed. The complete set of exchange interactions have been determined on the basis of a localized Heisenberg model. However, the spin wave dispersion in La1.2Sr1.8Mn2O7 shows softening close to the zone boundary and are also heavily damped especially close to the zone boundary and deviate from that expected for a simple Heisenberg model. A minimal double exchange model including quantum corrections can reproduce these effects qualitatively but falls short of quantitative agreement.
Volume 71 Issue 4 October 2008 pp 847-858 Invited Papers
Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France
Volume 96, 2022
Continuous Article Publishing mode
Click here for Editorial Note on CAP Mode