Charge and spin states of Ru and Cu in magnetic superconductor RuSr2GdCu2O8 studied by NMR

Kumagai, Ken-ichi; Takada, Satomi; Furukawa, Yuji

PHYSICAL REVIEW B, 2001, 63, 180509(R)

Permalink : https://hdl.handle.net/2115/5891

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アクセス権	open access
URI	https://hdl.handle.net/2115/5891
タイトル	Charge and spin states of Ru and Cu in magnetic superconductor RuSr2GdCu2O8 studied by NMR
著者	Kumagai, Ken-ichi ; Takada, Satomi ; Furukawa, Yuji
e-Rad_Researcher 70029560 著者名 Kumagai, Ken-ichi 熊谷, 健一
著者名 Takada, Satomi
著者名 Furukawa, Yuji
言語	英語
発行日	2001
出版者	American Physical Society
収録物名	PHYSICAL REVIEW B
巻(号)	63
ページ	180509(R)
抄録	Electronic and magnetic properties of RuSr2GdCu2O8 have been investigated by electric resistivity, magnetization, and Cu-, Ru-NMR measurements. Magnetic order (TM5133 K) and superconductivity [Ts(onset);52 K] have been confirmed. We observed two kinds of Ru-NMR signals (the hyperfine fields of 101Ru are 590 kOe and 290 kOe), suggesting a charge segregation of Ru5+ (S-3/2) and Ru4+ (S=1) in the RuO2 layers. The hyperfine field at the Cu site is diminishingly small, indicating magnetic interactions between CuO2 and RuO2 layers are weak. Assuming that holes are inherently doped in the CuO2 layers from the (Ru4+, Ru5+)O2 layers, the high-Tc superconductivity can occur under weak magnetic interactions between Ru and Cu spins in RuSr2GdCu2O8.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Copyright © 2001 American Physical Society
PISSN	0163-1829
関連情報	URI http://www.aps.org/
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1103/PhysRevB.63.180509