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

12 Scopus citations

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
State	Published - Oct 2003
Externally published	Yes
Event	Proceedings of the 15th International Symposium on Superconduc - Yokohama, Japan Duration: Nov 11 2002 → Nov 13 2002

Funding

This work was supported in part by the Japanese Ministry of Education, Culture, Sports, Science and Technology, Grant-in-Aid for Scientific Research on Priority Areas (Novel Quantum Phenomena in Transition Metal Oxides), for Scientific Research (A), and for Encouragement of Young Scientists, by the Japan Science and Technology Corporation, the Core Research for Evolutional Science and Technology Project (CREST).

Funders	Funder number
Japan Science and Technology Corporation
Ministry of Education, Culture, Sports, Science and Technology
Core Research for Evolutional Science and Technology

Keywords

Electron-doped superconductor
Neutron scattering
Spin fluctuations

Access to Document

10.1016/S0921-4534(03)00750-0

Cite this

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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

Y1 - 2003/10

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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SP - 130

EP - 134

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

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