Inelastic neutron scattering study of LiV2O5

✍ Scribed by Y Takeo; T Yosihama; M Nishi; K Nakajima; K Kakurai; M Isobe; Y Ueda

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 144 KB
• Volume: 60
• Category: Article
• ISSN: 0022-3697
• DOI: 10.1016/s0022-3697(99)00064-5

✦ Synopsis

Neutron inelastic scattering experiments were carried out on a mixed valent (V 4ϩ /V 5ϩ ) vanadate LiV 2 O 5 . Observed spin wave excitations suggest that the antiferromagnetic (AF) periodicity along the b-axis (chain) direction is characterized by the doubling of the chemical unit cell. A strong dispersion along the b*-axis, an almost l(stacking)-independent excitations and the low energy excitations down to about 1 meV at the AF zone center were also clearly observed. These results suggest that LiV 2 O 5 can be regarded as independent S 1/2 AF linear chains with a zone boundary energy of 42 ^3 meV estimated from the quantum renormalized spin wave dispersion relation.