Synthesis and characterization of the crystal structure and magnetic properties of the ternary manganese vanadate NaMnVO4

Hamdi Yahia, Etienne Gaudin, Khalid Boulahya, Jacques Darriet, Won Joon Son, Myung Hwan Whangbo

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Abstract

A new ternary manganese vanadate, NaMnVO4, was synthesized by solid state reaction route, and its crystal structure and magnetic properties were characterized by X-ray diffraction, magnetic susceptibility and specific heat measurements, and by density functional calculations. NaMnVO4 crystallizes in the maricite-type structure with space group Pnma, a = 9.563(1) Å, b = 6.882(1) Å, c = 5.316(1) Å, and Z = 4. NaMnVO 4 contains MnO4 chains made up of edge-sharing MnO 6 octahedra, and these chains are interlinked by VO4 tetrahedra. The magnetic susceptibility has a broad maximum at Tmax = 24 K and follows the Curie-Weiss behavior above 70 K with θ = -62 K. NaMnVO4 undergoes a three-dimensional antiferromagnetic ordering at TN = 11.8 K. The spin exchanges of NaMnVO4 are dominated by the intrachain antiferromagnetic exchange, and the interchain spin exchanges are spin-frustrated. The most probable magnetic structure of the ordered magnetic state below TN was predicted on the basis of the extracted spin exchanges.

Original languageEnglish
Pages (from-to)8578-8582
Number of pages5
JournalInorganic Chemistry
Volume49
Issue number18
DOIs
Publication statusPublished - 20 Sep 2010
Externally publishedYes

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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