Nuclear magnetic resonance study of the Ru/Mn valence states and magnetic interactions in SrRu0.9Mn0.1O3

被引：14

作者：

Han, Z. H. ^{[1
]}

Budnick, J. I.

Hines, W. A.

Dabrowski, B.

Maxwell, T.

机构：

[1] Univ Rochester, Dept Biomed Engn, Rochester, NY 14642 USA

[2] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA

[3] Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA

[4] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 10期

关键词：

D O I：

10.1063/1.2345595

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The substitution of Mn for Ru in SrRuO3 suppresses the ferromagnetic (FM) order monotonically at low concentration (< 0.39) and induces antiferromagnetic (AFM) order at high concentration (> 0.39). In an attempt to understand how the Mn substitution initially modifies the magnetic interactions in SrRu1-xMnxO3, a polycrystalline SrRu0.9Mn0.1O3 sample was prepared and studied by Mn-55 and Ru-99,Ru-101 spin-echo nuclear magnetic resonance (NMR). Mn-55 NMR reveals that the Mn dopants are in an intermediate Mn3+/4+ valence state due to fast electron hopping. The magnetic interaction between the Mn ions is FM, mediated by the double exchange mechanism. The Ru4+ hyperfine field is reduced due to an AFM coupling with the Mn moments, which shifts the Ru NMR peaks to lower frequencies. The suppression of the FM ordering temperature in SrRu1-xMnxO3 is attributed to the interruption of the itinerancy of the Ru 4d electrons by Mn substitution. (c) 2006 American Institute of Physics.

引用

页数：3

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