Field-Induced Uniform Antiferromagnetic Order Associated with Superconductivity in Pr_<1-x>LaCe_xCuO_<4-δ>
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- KADONO Ryosuke
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK)
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- OHISHI Kazuki
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK)
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- KODA Akihiro
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK)
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- SAHA Shanta R.
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK)
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- HIGEMOTO Wataru
- Advanced Science Research Center, Japan Atomic Energy Research Institute
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- FUJITA Masaki
- Institute for Materials Research, Tohoku University
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- YAMADA Kazuyoshi
- Institute for Materials Research, Tohoku University
Bibliographic Information
- Other Title
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- Field Induced Uniform Antiferromagnetic Order Associated with Superconductivity in Pr1 xLaCexCuO4 デルタ
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Abstract
A strong correlation between field-induced antiferromagnetic (AF) order and superconductivity is demonstrated for an electron-doped cuprate superconductor, Pr_<1-x>LaCe_xCuO_<4-δ>(PLCCO). In addition to the specimen with x=0.11 (which is close to the AF phase boundary, x≃0.10), we show that the specimen with x=0.15 (T_c≃16 K at zero field) also exhibits the field-induced AF order with a reduced magnitude of the induced moment. The uniform muon Knight shift at a low magnetic field (〜10^2 Oe) indicates that the AF order is not localized within the cores of flux lines, which is in marked contrast to theoretical predictions for hole-doped cuprates. The presence of anomalous nondiagonal hyperfine coupling between muons and Pr ions is also demonstrated in detail.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 74 (10), 2806-2812, 2005-10-15
The Physical Society of Japan (JPS)