The valence and spin states of Ru ions in magnetic superconductors RuEu1.4Ce0-6Sr2Cu2O10-δ and RuSr2YCu2O8 studied by 99/101Ru-NMR

被引：1
|
作者：
Furukawa, Y [1 ]
Takada, S
Kumagai, K
Kawashima, T
Takayama-Muromachi, E
机构：
[1] Hokkaido Univ, Div Phys, Grad Sch Sci, Sapporo, Hokkaido 0600810, Japan
[2] Natl Inst Res Inorgan Mat, Tsukuba, Ibaraki 3050044, Japan
来源：
JOURNAL OF LOW TEMPERATURE PHYSICS | 2003年 / 131卷 / 5-6期
关键词：
D O I：
10.1023/A:1023417613821
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have carried out Ru-99/101-NMR measurements at zero magnetic field in magnetic superconductors RuEu1.4Ce0.6Sr2Cu2O10-delta and RuSr2 YCu2O8 to investigate charge and magnetic states of Ru ions in its magnetically ordered state. In RuEu1.4Ce0.6Sr2Cu2O10-delta, only one Ru site corresponding to Ru5+ ions with S=3/2 high spin state was shown to exist. This contrasts sharply to the case of RuSr2YCu2O8 where two kinds of Ru sites of Ru5+ (S=3/2) and Ru4+ (S=1) were observed. These results indicate the magnetic and charge states of the Ru ions in the RuO2 planes are different for both systems.
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页码：1141 / 1145
页数：5
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