Abstract
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.
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References
Y Moritomo, A Asamitsu, H Kuwahara and Y Tokura,Nature 380, 141 (1996)
Y Tokura (Eds.),Colossal magnetoresistive oxides (Gordon and Breach, Amsterdam, 2000)
T Chatterji, P Thalmeier, G J McIntyre, R van de Kamp, R Suryanarayanan, G Dahlenne and A Revcolevschi,Europhys. Lett. 46, 801 (1999)
T Chatterji, L P Regnault, P Thalmeier, R Suryanarayanan, G Dahlenne and A Revcolevschi,Phys. Rev. B60, R6965 (1999)
T Chatterji, L P Regnault, P Thalmeier, R van de Kamp, W Schmidt, A Hiess, P Vorderwisch, R Suryanarayanan, G Dahlenne and A Revcolevschi,J. Alloys Compounds 326, 15 (2001)
H Fujioka, M Kubota, K Hirota, H Yoshizawa, Y Moritomo and Y Endo,J. Phys. Chem. Solids 60, 1165 (1999)
K Hirota, S Ishihara, H Fujioka, M Kubota, H Yoshizawa, Y Moritomo, Y Endoh and S Maekawa,Phys. Rev. B65, 64414 (2002)
G Chaboussant, T G Perring, G Aeppli and Y Tokura,Physica B276-278, 801 (2000)
T G Perring, D T Androja, G Chaboussant, G Aeppli, T Kimura and Y Tokura,Phys. Rev. Lett. 87, 217201 (2001)
S Rosenkranz, R Osborn, L Vasiliu-Doloc, J F Mitchell, J W Lynn and S K Sinha,J. Appl. Phys. 87, 5816 (2000)
Nic Shannon, T Chatterji, F Ouchini and P Thalmeier,Euro. Phys. J. B27, 287 (2002)
Y Motome and N Furukawa,J. Phys. Soc. Jpn. 71, 1419 (2002)
H Mook,Spin waves and magnetic excitations I edited by A S Borovik-Romanov and S K Sinha (Elsevier, Amsterdam, 1988) p. 425
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Chatterji, T. Spin dynamics of bilayer manganites. Pramana - J Phys 63, 143–153 (2004). https://doi.org/10.1007/BF02704061
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DOI: https://doi.org/10.1007/BF02704061