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

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

doi:10.1143/JPSJ.67.645

Magnetic Excitations in the Si Doped Spin-Peierls Compound CuGe_1-xSi_xO₃

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

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

The magnetic excitations of CuGe_1-xSi_xO₃ 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 language	English
Pages (from-to)	645-650
Number of pages	6
Journal	journal of the physical society of japan
Volume	67
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.67.645
Publication status	Published - Feb 1998
Externally published	Yes

Keywords

Antiferromagnetic spin wave
CuGeSiO
Spin-Peierls transition

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.67.645

Cite this

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title = "Magnetic Excitations in the Si Doped Spin-Peierls Compound CuGe1-xSixO3",

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 {\AA}-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.",

keywords = "Antiferromagnetic spin wave, CuGeSiO, Spin-Peierls transition",

author = "Kazuma Hirota and Masashi Hase and Jun Akimitsu and Takatsugu Masuda and Kunimitsu Uchinokura and Gen Shirane",

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T1 - Magnetic Excitations in the Si Doped Spin-Peierls Compound CuGe1-xSixO3

AU - Hirota, Kazuma

AU - Hase, Masashi

AU - Akimitsu, Jun

AU - Masuda, Takatsugu

AU - Uchinokura, Kunimitsu

AU - Shirane, Gen

PY - 1998/2

Y1 - 1998/2

N2 - 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.

AB - 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.

KW - Antiferromagnetic spin wave

KW - CuGeSiO

KW - Spin-Peierls transition

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