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 Tc 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 | |
| Publication status | Published - Nov 2001 |
| Externally published | Yes |
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Keywords
- Cu-NMR
- Ferromagnetic superconductor
- RuSrYCuO
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Coexistence of ferromagnetism and superconductivity in magnetic superconductor RuSr2YCu2O8 revealed by 63Cu-NMR. / Tokunaga, Y.; Kotegawa, H.; Ishida, K.; Kitaoka, Y.; Takagiwa, H.; Akimitsu, Jun.
In: Physica C: Superconductivity and its Applications, Vol. 364-365, 11.2001, p. 379-382.Research output: Contribution to journal › Article
}
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, Jun
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 Tc 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.
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 Tc 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.
KW - Cu-NMR
KW - Ferromagnetic superconductor
KW - RuSrYCuO
UR - http://www.scopus.com/inward/record.url?scp=18144440197&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=18144440197&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(01)00801-2
DO - 10.1016/S0921-4534(01)00801-2
M3 - Article
AN - SCOPUS:18144440197
VL - 364-365
SP - 379
EP - 382
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
ER -