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

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 1 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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Tokunaga, Y., Kotegawa, H., Ishida, K., Kitaoka, Y., Takagiwa, H., & Akimitsu, J. (2001). Coexistence of ferromagnetism and superconductivity in magnetic superconductor RuSr₂YCu₂O₈ revealed by ⁶³Cu-NMR. Physica C: Superconductivity and its applications, 364-365, 379-382. https://doi.org/10.1016/S0921-4534(01)00801-2

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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.",

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

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AU - Tokunaga, Y.

AU - Kotegawa, H.

AU - Ishida, K.

AU - Kitaoka, Y.

AU - Takagiwa, H.

AU - Akimitsu, J.

PY - 2001/11/1

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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.

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