Structural and magnetic properties of Pr18Li8Fe5-xMxO39 (M = Ru, Mn, Co)

被引：5

作者：

Dutton, Sian E. ^{[1
]}

Battle, Peter D. ^{[1
]}

Grandjean, Fernande ^{[2
]}

Long, Gary J. ^{[3
]}

Sougrati, Moulay T. ^{[2
]}

van Daesdonk, Peter A. ^{[1
]}

Winstone, Emma ^{[1
]}

机构：

[1] Univ Oxford, Dept Chem, Inorgan Chem Lab, Oxford OX1 3QR, England

[2] Univ Liege, Dept Phys, B-4000 Sart Tilman Par Liege, Belgium

[3] Univ Missouri, Missouri Univ Sci & Technol, Dept Chem, Rolla, MO 65409 USA

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2009年 / 182卷 / 07期

关键词：

Mixed-metal oxide; Magnetism; Neutron diffraction; Mossbauer spectroscopy; CRYSTAL-STRUCTURE; HIGH-PRESSURE; CHEMISTRY; OXIDES; LAXSR1-XRUO3; REFINEMENT; SERIES; CATION; LA;

D O I：

10.1016/j.jssc.2009.04.002

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A polycrystalline sample of Pr18Li8Fe4RuO39 has been synthesized by a solid state method and characterized by neutron powder diffraction, magnetometry and Mossbauer spectroscopy; samples of Pr18Li8Fe5-xMxO39 and Pr18Li8Fe5-xCoxO39 (x = 1, 2) have been studied by magnetometry. All these Compounds adopt a cubic structure (space group Pm (3) over barn, a(o)similar to 11.97 angstrom) based on intersecting < 111 > chains made up of alternating octahedral and trigonal-prismatic coordination sites. These chains occupy channels within a Pr-O framework. The trigonal-prismatic site in Pr18Li8Fe4RuO39 is occupied by Li+ and high-spin Fe3+. The remaining transition-metal cations occupy the two crystallographically-distinct octahedral sites in a disordered manner. All five compositions adopt a spin-glass-like state at 7 K (Pr18Li8Fe4RuO39) or below. (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：1638 / 1648

页数：11

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