Coexistence of ferromagnetism and superconductivity in magnetic superconductor RuSr2YCu2O8 revealed by 63Cu-NMR

Y. Tokunaga; H. Kotegawa; K. Ishida; Y. Kitaoka; H. Takagiwa; J. Akimitsu

doi:10.1016/S0921-4534(01)00801-2

Coexistence of ferromagnetism and superconductivity in magnetic superconductor RuSr₂YCu₂O₈ revealed by ⁶³Cu-NMR

Y. Tokunaga, H. Kotegawa, K. Ishida, Y. Kitaoka, H. Takagiwa, J. Akimitsu

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

⁶³Cu-NMR measurement has been performed to investigate the coexistence of superconductivity and ferromagnetism in a hybrid ruthenium (Ru)-copper (Cu) oxide superconductor RuSr₂YCu₂O₈ (RuY1212). Broadening of the Cu-NMR signal below T_M demonstrates that Cu nuclei in CuO₂ planes feel a dipolar field from ordered Ru moments in RuO₂ planes. On the other hand, the opening of the SC gap is confirmed from the observation of a decrease in the nuclear spin-lattice relaxation rate, ⁶³1/T₁, below T_c^onset = 45 K. These NMR results provide evidence that the superconductivity coexists with the (field induced) ferromagnetism at a microscopic scale. We also found that the T dependence and the magnitude of 1/T₁T are quite similar to those in YBa₂Cu₃O₇ (Y1237), indicative of the same spin-fluctuation character in both compounds. This suggests that the hole content in RuY1212 is comparable to that in Y1237.

Original language	English
Pages (from-to)	379-382
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	364-365
DOIs	https://doi.org/10.1016/S0921-4534(01)00801-2
Publication status	Published - Nov 2001
Externally published	Yes

Keywords

Cu-NMR
Ferromagnetic superconductor
RuSrYCuO

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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@article{e8738d6f5e044344ba350bdb51c48c47,

title = "Coexistence of ferromagnetism and superconductivity in magnetic superconductor RuSr2YCu2O8 revealed by 63Cu-NMR",

abstract = "63Cu-NMR measurement has been performed to investigate the coexistence of superconductivity and ferromagnetism in a hybrid ruthenium (Ru)-copper (Cu) oxide superconductor RuSr2YCu2O8 (RuY1212). Broadening of the Cu-NMR signal below TM demonstrates that Cu nuclei in CuO2 planes feel a dipolar field from ordered Ru moments in RuO2 planes. On the other hand, the opening of the SC gap is confirmed from the observation of a decrease in the nuclear spin-lattice relaxation rate, 631/T1, below Tconset = 45 K. These NMR results provide evidence that the superconductivity coexists with the (field induced) ferromagnetism at a microscopic scale. We also found that the T dependence and the magnitude of 1/T1T are quite similar to those in YBa2Cu3O7 (Y1237), indicative of the same spin-fluctuation character in both compounds. This suggests that the hole content in RuY1212 is comparable to that in Y1237.",

keywords = "Cu-NMR, Ferromagnetic superconductor, RuSrYCuO",

author = "Y. Tokunaga and H. Kotegawa and K. Ishida and Y. Kitaoka and H. Takagiwa and J. Akimitsu",

note = "Funding Information: The authors would like to thank G.-q. Zheng, H. Mukuda, S. Nakatsuji, Y. Maeno, Y. Furukawa and K. Kumagai for valuable discussions. This work was partly supported by the COE Research (10CE2004) in a Grant-in-Aid for Scientific Research from the Ministry of Education, Sports, Science and Culture of Japan. One of authors (Y.T) have been supported by JSPS Research Fellowships for Young Scientists. ",

year = "2001",

month = nov,

doi = "10.1016/S0921-4534(01)00801-2",

language = "English",

volume = "364-365",

pages = "379--382",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

}

TY - JOUR

T1 - Coexistence of ferromagnetism and superconductivity in magnetic superconductor RuSr2YCu2O8 revealed by 63Cu-NMR

AU - Tokunaga, Y.

AU - Kotegawa, H.

AU - Ishida, K.

AU - Kitaoka, Y.

AU - Takagiwa, H.

AU - Akimitsu, J.

N1 - Funding Information: The authors would like to thank G.-q. Zheng, H. Mukuda, S. Nakatsuji, Y. Maeno, Y. Furukawa and K. Kumagai for valuable discussions. This work was partly supported by the COE Research (10CE2004) in a Grant-in-Aid for Scientific Research from the Ministry of Education, Sports, Science and Culture of Japan. One of authors (Y.T) have been supported by JSPS Research Fellowships for Young Scientists.

PY - 2001/11

Y1 - 2001/11

N2 - 63Cu-NMR measurement has been performed to investigate the coexistence of superconductivity and ferromagnetism in a hybrid ruthenium (Ru)-copper (Cu) oxide superconductor RuSr2YCu2O8 (RuY1212). Broadening of the Cu-NMR signal below TM demonstrates that Cu nuclei in CuO2 planes feel a dipolar field from ordered Ru moments in RuO2 planes. On the other hand, the opening of the SC gap is confirmed from the observation of a decrease in the nuclear spin-lattice relaxation rate, 631/T1, below Tconset = 45 K. These NMR results provide evidence that the superconductivity coexists with the (field induced) ferromagnetism at a microscopic scale. We also found that the T dependence and the magnitude of 1/T1T are quite similar to those in YBa2Cu3O7 (Y1237), indicative of the same spin-fluctuation character in both compounds. This suggests that the hole content in RuY1212 is comparable to that in Y1237.

AB - 63Cu-NMR measurement has been performed to investigate the coexistence of superconductivity and ferromagnetism in a hybrid ruthenium (Ru)-copper (Cu) oxide superconductor RuSr2YCu2O8 (RuY1212). Broadening of the Cu-NMR signal below TM demonstrates that Cu nuclei in CuO2 planes feel a dipolar field from ordered Ru moments in RuO2 planes. On the other hand, the opening of the SC gap is confirmed from the observation of a decrease in the nuclear spin-lattice relaxation rate, 631/T1, below Tconset = 45 K. These NMR results provide evidence that the superconductivity coexists with the (field induced) ferromagnetism at a microscopic scale. We also found that the T dependence and the magnitude of 1/T1T are quite similar to those in YBa2Cu3O7 (Y1237), indicative of the same spin-fluctuation character in both compounds. This suggests that the hole content in RuY1212 is comparable to that in Y1237.

KW - Cu-NMR

KW - Ferromagnetic superconductor

KW - RuSrYCuO

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