Spatially Inhomogeneous Superconducting State near H-c₂ in UPd₂Al₃
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- Kitagawa, Shunsaku
- Department of Physics, Graduate School of Science, Kyoto University
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- Takaki, Ryoichi
- Department of Physics, Graduate School of Science, Kyoto University
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- Manago, Masahiro
- Department of Physics, Graduate School of Science, Kyoto University
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- Ishida, Kenji
- Department of Physics, Graduate School of Science, Kyoto University
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- Sato, Noriaki K.
- Department of Physics, Graduate School of Science, Nagoya University
Bibliographic Information
- Other Title
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- Spatially Inhomogeneous Superconducting State near <i>H</i><sub>c2</sub> in UPd<sub>2</sub>Al<sub>3</sub>
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Abstract
We have performed ²⁷Al-NMR measurements on single-crystalline UPd₂Al₃ with the field parallel to the c-axis to investigate the superconducting (SC) properties near the upper critical field of superconductivity Hc₂. The broadening of the NMR linewidth below 14 K indicates the appearance of the internal field at the Al site, which originates from the antiferromagnetically ordered moments of U 5f electrons. In the SC state well below μ₀Hc₂ = 3.4 T, the broadening of the NMR linewidth due to the SC diamagnetism and a decrease in the Knight shift are observed, which are well-understood by the framework of spin-singlet superconductivity. In contrast, the Knight shift does not change below Tc(H), and the NMR spectrum is broadened symmetrically in the SC state in the field range of 3 T < μ₀H < μ₀Hc₂. The unusual NMR spectrum near Hc2 suggests that a spatially inhomogeneous SC state such as the Fulde–Ferrell–Larkin–Ovchinnikov (FFLO) state would be realized.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 87 (1), 013701-, 2018-01-15
Physical Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1050859073008341376
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- NII Article ID
- 210000134651
- 40021431680
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- NII Book ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- HANDLE
- 2433/282049
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- NDL BIB ID
- 028759182
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- Text Lang
- en
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- Article Type
- journal article
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- Data Source
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- IRDB
- NDL
- Crossref
- CiNii Articles
- KAKEN