Title

Structural and Magnetic Properties of Pr₁₈Li₈Fe₅₋ₓMₓO₃₉ (M=Ru, Mn, Co)

Abstract

A polycrystalline sample of Pr18Li8Fe4RuO39 has been synthesized by a solid state method and characterized by neutron powder diffraction, magnetometry and Mössbauer spectroscopy; samples of Pr18Li8Fe5-xMnxO 39 and Pr18Li8Fe5-xCoxO 39 (x=1, 2) have been studied by magnetometry. All these compounds adopt a cubic structure (space group Pm over(3, -) n, a0∼11.97 Å) 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. © 2009 Elsevier Inc. All rights reserved.

Department(s)

Chemistry

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2009 Elsevier, All rights reserved.


Share

 
COinS