Neutron-scattering study of spin correlations in electron-doped Pr 0.89LaCe0.11CuO4 single crystals

M. Fujita; S. Kuroshima; M. Matsuda; K. Yamada

doi:10.1016/S0921-4534(03)00750-0

Neutron-scattering study of spin correlations in electron-doped Pr _0.89LaCe_0.11CuO₄ single crystals

M. Fujita, S. Kuroshima, M. Matsuda, K. Yamada

Research output: Contribution to journal › Conference article › peer-review

11 Citations (Scopus)

Abstract

We have performed neutron-scattering measurements on the single crystals of electron-doped cuprate, Pr_0.89LaCe_0.11CuO _4-δ in order to study the relationship between spin correlations and the superconductivity. In the non-superconducting as-grown x = 0.11 sample, clear magnetic Bragg peak appears below 200 K, while no evidence of antiferromagnetic order was found in the oxygen-reduced superconducting one (T_c = 25.5 K). These results imply that superconductivity concomitantly appears with the degradation of a magnetic ordering by oxygen-reduced procedure. Furthermore, we observed clear commensurate low-energy spin fluctuations, at the antiferromagnetic zone center in both as-grown and reduced samples, analogous to the result for Nd _1.85Ce_0.15CuO₄. Therefore, commensurate spin fluctuations are robust against the electron-doping and is commonly exist in the electron-doped superconductors.

Original language	English
Pages (from-to)	130-134
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	392-396
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0921-4534(03)00750-0
Publication status	Published - 2003 Oct 1
Externally published	Yes
Event	Proceedings of the 15th International Symposium on Superconduc - Yokohama, Japan Duration: 2002 Nov 11 → 2002 Nov 13

Keywords

Electron-doped superconductor
Neutron scattering
Spin fluctuations

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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title = "Neutron-scattering study of spin correlations in electron-doped Pr 0.89LaCe0.11CuO4 single crystals",

abstract = "We have performed neutron-scattering measurements on the single crystals of electron-doped cuprate, Pr0.89LaCe0.11CuO 4-δ in order to study the relationship between spin correlations and the superconductivity. In the non-superconducting as-grown x = 0.11 sample, clear magnetic Bragg peak appears below 200 K, while no evidence of antiferromagnetic order was found in the oxygen-reduced superconducting one (Tc = 25.5 K). These results imply that superconductivity concomitantly appears with the degradation of a magnetic ordering by oxygen-reduced procedure. Furthermore, we observed clear commensurate low-energy spin fluctuations, at the antiferromagnetic zone center in both as-grown and reduced samples, analogous to the result for Nd 1.85Ce0.15CuO4. Therefore, commensurate spin fluctuations are robust against the electron-doping and is commonly exist in the electron-doped superconductors.",

keywords = "Electron-doped superconductor, Neutron scattering, Spin fluctuations",

author = "M. Fujita and S. Kuroshima and M. Matsuda and K. Yamada",

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TY - JOUR

T1 - Neutron-scattering study of spin correlations in electron-doped Pr 0.89LaCe0.11CuO4 single crystals

AU - Fujita, M.

AU - Kuroshima, S.

AU - Matsuda, M.

AU - Yamada, K.

PY - 2003/10/1

Y1 - 2003/10/1

N2 - We have performed neutron-scattering measurements on the single crystals of electron-doped cuprate, Pr0.89LaCe0.11CuO 4-δ in order to study the relationship between spin correlations and the superconductivity. In the non-superconducting as-grown x = 0.11 sample, clear magnetic Bragg peak appears below 200 K, while no evidence of antiferromagnetic order was found in the oxygen-reduced superconducting one (Tc = 25.5 K). These results imply that superconductivity concomitantly appears with the degradation of a magnetic ordering by oxygen-reduced procedure. Furthermore, we observed clear commensurate low-energy spin fluctuations, at the antiferromagnetic zone center in both as-grown and reduced samples, analogous to the result for Nd 1.85Ce0.15CuO4. Therefore, commensurate spin fluctuations are robust against the electron-doping and is commonly exist in the electron-doped superconductors.

AB - We have performed neutron-scattering measurements on the single crystals of electron-doped cuprate, Pr0.89LaCe0.11CuO 4-δ in order to study the relationship between spin correlations and the superconductivity. In the non-superconducting as-grown x = 0.11 sample, clear magnetic Bragg peak appears below 200 K, while no evidence of antiferromagnetic order was found in the oxygen-reduced superconducting one (Tc = 25.5 K). These results imply that superconductivity concomitantly appears with the degradation of a magnetic ordering by oxygen-reduced procedure. Furthermore, we observed clear commensurate low-energy spin fluctuations, at the antiferromagnetic zone center in both as-grown and reduced samples, analogous to the result for Nd 1.85Ce0.15CuO4. Therefore, commensurate spin fluctuations are robust against the electron-doping and is commonly exist in the electron-doped superconductors.

KW - Electron-doped superconductor

KW - Neutron scattering

KW - Spin fluctuations

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AN - SCOPUS:0041689675

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SP - 130

EP - 134

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

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T2 - Proceedings of the 15th International Symposium on Superconduc

Y2 - 11 November 2002 through 13 November 2002

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