Magnetic Excitations in the Si Doped Spin-Peierls Compound CuGe1-xSixO3

Kazuma Hirota, Masashi Hase, Jun Akimitsu, Takatsugu Masuda, Kunimitsu Uchinokura, Gen Shirane

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The magnetic excitations of CuGe1-xSixO3 single crystals (x = 0.011 and 0.03) have been studied by inelastic neutron-scattering techniques. We confirm the coexistence of the antiferromagnetic and spin-Peierls excitations as well as a splitting of the antiferromagnetic excitation peak at the magnetic zone center (q = 0) due to orthorhombic anisotropy. The q dependence of the antiferromagnetic spin-wave width Γ scales well with q2 for small q (q < 0.1 Å-1). We also find that the spin-wave velocity increases as the size of induced magnetic moment becomes larger. These experimental results strongly support recent theoretical predictions by Saito and Fukuyama.

Original languageEnglish
Pages (from-to)645-650
Number of pages6
Journaljournal of the physical society of japan
Volume67
Issue number2
DOIs
Publication statusPublished - Feb 1998
Externally publishedYes

Keywords

  • Antiferromagnetic spin wave
  • CuGeSiO
  • Spin-Peierls transition

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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