Microwave EPR spectroscopy of cobalt-doped germanium cuprate

S. V. Demishev, A. V. Semeno, N. E. Sluchanko, N. A. Samarin, A. A. Pronin, Y. Inagaki, S. Okubo, H. Ohta, Y. Oshima, L. I. Leonyuk

研究成果: ジャーナルへの寄稿 › 記事

11 引用 (Scopus)

抄録

Resonance magnetoabsorption spectra of CuGeO3 single crystals containing 2% Co impurity have been studied in the frequency range 60-360 GHz in magnetic fields of up to 16 T and in the temperature interval 2-60 K with the magnetic field B aligned parallel to the a crystallographic axis. In addition to the Cu2+ chain resonance, a new absorption line (unobserved previously in doped CuGeO3 and deriving apparently from the Co 2+ ions) was detected in EPR spectra. Quantitative analysis of the spectra suggests that the spin-Peierls transition occurs in about 10% Cu 2+ chains, while the spin-Peierls state in the remaining 90% chains is completely destroyed by cobalt doping. The results obtained reveal considerable deviations from the universally accepted scenario of CuGeO 3 doping and are discussed within alternative theoretical models, namely, the quantum critical behavior (based on the EPR theory for quasi-one-dimensional systems) and a three-dimensional antiferromagnet with the Néel temperature lowered by disorder.

元の言語英語
ページ（範囲）2238-2248
ページ数11
ジャーナルPhysics of the Solid State
巻46
発行部数12
DOI
出版物ステータス出版済み - 12 1 2004

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Germanium
Cobalt
cuprates
Paramagnetic resonance
germanium
cobalt
Microwaves
Doping (additives)
Spectroscopy
Magnetic fields
microwaves
spectroscopy
Single crystals
Impurities
Ions
magnetic fields
Temperature
quantitative analysis
frequency ranges
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

これを引用

Demishev, S. V., Semeno, A. V., Sluchanko, N. E., Samarin, N. A., Pronin, A. A., Inagaki, Y., ... Leonyuk, L. I. (2004). Microwave EPR spectroscopy of cobalt-doped germanium cuprate. Physics of the Solid State, 46(12), 2238-2248. https://doi.org/10.1134/1.1841388

Microwave EPR spectroscopy of cobalt-doped germanium cuprate. / Demishev, S. V.; Semeno, A. V.; Sluchanko, N. E.; Samarin, N. A.; Pronin, A. A.; Inagaki, Y.; Okubo, S.; Ohta, H.; Oshima, Y.; Leonyuk, L. I.

：: Physics of the Solid State, 巻 46, 番号 12, 01.12.2004, p. 2238-2248.

研究成果: ジャーナルへの寄稿 › 記事

Demishev, SV, Semeno, AV, Sluchanko, NE, Samarin, NA, Pronin, AA, Inagaki, Y, Okubo, S, Ohta, H, Oshima, Y & Leonyuk, LI 2004, 'Microwave EPR spectroscopy of cobalt-doped germanium cuprate', Physics of the Solid State, 巻. 46, 番号 12, pp. 2238-2248. https://doi.org/10.1134/1.1841388
Demishev SV, Semeno AV, Sluchanko NE, Samarin NA, Pronin AA, Inagaki Y その他. Microwave EPR spectroscopy of cobalt-doped germanium cuprate. Physics of the Solid State. 2004 12 1;46(12):2238-2248. https://doi.org/10.1134/1.1841388
Demishev, S. V. ; Semeno, A. V. ; Sluchanko, N. E. ; Samarin, N. A. ; Pronin, A. A. ; Inagaki, Y. ; Okubo, S. ; Ohta, H. ; Oshima, Y. ; Leonyuk, L. I. / Microwave EPR spectroscopy of cobalt-doped germanium cuprate. ：: Physics of the Solid State. 2004 ; 巻 46, 番号 12. pp. 2238-2248.
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abstract = "Resonance magnetoabsorption spectra of CuGeO3 single crystals containing 2{\%} Co impurity have been studied in the frequency range 60-360 GHz in magnetic fields of up to 16 T and in the temperature interval 2-60 K with the magnetic field B aligned parallel to the a crystallographic axis. In addition to the Cu2+ chain resonance, a new absorption line (unobserved previously in doped CuGeO3 and deriving apparently from the Co 2+ ions) was detected in EPR spectra. Quantitative analysis of the spectra suggests that the spin-Peierls transition occurs in about 10{\%} Cu 2+ chains, while the spin-Peierls state in the remaining 90{\%} chains is completely destroyed by cobalt doping. The results obtained reveal considerable deviations from the universally accepted scenario of CuGeO 3 doping and are discussed within alternative theoretical models, namely, the quantum critical behavior (based on the EPR theory for quasi-one-dimensional systems) and a three-dimensional antiferromagnet with the N{\'e}el temperature lowered by disorder.",
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AU - Demishev, S. V.

AU - Semeno, A. V.

AU - Sluchanko, N. E.

AU - Samarin, N. A.

AU - Pronin, A. A.

AU - Inagaki, Y.

AU - Okubo, S.

AU - Ohta, H.

AU - Oshima, Y.

AU - Leonyuk, L. I.

PY - 2004/12/1

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N2 - Resonance magnetoabsorption spectra of CuGeO3 single crystals containing 2% Co impurity have been studied in the frequency range 60-360 GHz in magnetic fields of up to 16 T and in the temperature interval 2-60 K with the magnetic field B aligned parallel to the a crystallographic axis. In addition to the Cu2+ chain resonance, a new absorption line (unobserved previously in doped CuGeO3 and deriving apparently from the Co 2+ ions) was detected in EPR spectra. Quantitative analysis of the spectra suggests that the spin-Peierls transition occurs in about 10% Cu 2+ chains, while the spin-Peierls state in the remaining 90% chains is completely destroyed by cobalt doping. The results obtained reveal considerable deviations from the universally accepted scenario of CuGeO 3 doping and are discussed within alternative theoretical models, namely, the quantum critical behavior (based on the EPR theory for quasi-one-dimensional systems) and a three-dimensional antiferromagnet with the Néel temperature lowered by disorder.

AB - Resonance magnetoabsorption spectra of CuGeO3 single crystals containing 2% Co impurity have been studied in the frequency range 60-360 GHz in magnetic fields of up to 16 T and in the temperature interval 2-60 K with the magnetic field B aligned parallel to the a crystallographic axis. In addition to the Cu2+ chain resonance, a new absorption line (unobserved previously in doped CuGeO3 and deriving apparently from the Co 2+ ions) was detected in EPR spectra. Quantitative analysis of the spectra suggests that the spin-Peierls transition occurs in about 10% Cu 2+ chains, while the spin-Peierls state in the remaining 90% chains is completely destroyed by cobalt doping. The results obtained reveal considerable deviations from the universally accepted scenario of CuGeO 3 doping and are discussed within alternative theoretical models, namely, the quantum critical behavior (based on the EPR theory for quasi-one-dimensional systems) and a three-dimensional antiferromagnet with the Néel temperature lowered by disorder.

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