17O NMR observation of universal behavior of ferromagnetic spin fluctuations in the itinerant magnetic system Sr1-xCaxRuO3

被引：145

作者：

Yoshimura, K ^{[1
]}

Imai, T

Kiyama, T

Thurber, KR

Hunt, AW

Kosuge, K

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

[2] MIT, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA

[3] Kyoto Univ, Dept Chem, Grad Sch Sci, Kyoto 606, Japan

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.83.4397

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first O-17 NMR study of spin dynamics in itinerant ferromagnet SrRuO3 (T-C = 160 K) and Ca-doped variant Sr1-xCaxRuO3 for x = 0.6 (T-C = 24 K) and x = 1 (exchange enhanced paramagnet). We observed robust ferromagnetic spin fluctuations for all concentrations including CaRuO3, even though the sign of Weiss temperature crosses over from positive to negative above x similar to 0.7. At elevated temperatures, ferromagnetic spin fluctuations exhibit a universal behavior.

引用

页码：4397 / 4400

页数：4

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