Structural and magnetic properties of a new type of ordered oxygen-deficient perovskite, KMnVO 4

Hamdi Yahia, E. Gaudin, C. Lee, M. H. Whangbo, J. Darriet

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A new ternary vanadate KMnVO 4 was prepared by a solid-state reaction and was shown to be a new type of ordered oxygen-deficient perovskite ABO 3 - δ with δ = 1/3. Its formula can be rewritten as (K 2,Mn)[Mn,V 2]O 81. An ordered distribution of potassium and manganese atoms in the A site and of vanadium and manganese atoms in the B site is observed. The manganese atoms are in distorted octahedral and tetrahedral sites, whereas all of the vanadium atoms form VO 4 3- tetrahedra. This oxide contains four different types of high-spin Mn 2+ ions in equal number. Magnetic susceptibility and specific heat measurements as well as spin dimer analysis show that substantial antiferromagnetic spin-exchange interactions occur primarily among three of the four different types of Mn 2+ ions, and the fourth Mn 2+ ion remains paramagnetic down to 2 K.

Original languageEnglish
Pages (from-to)5563-5569
Number of pages7
JournalChemistry of Materials
Volume19
Issue number23
DOIs
Publication statusPublished - 13 Nov 2007
Externally publishedYes

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Perovskite
Structural properties
Magnetic properties
Manganese
Oxygen
Atoms
Vanadium
Ions
Thermal variables measurement
Vanadates
Exchange interactions
Solid state reactions
Magnetic susceptibility
Dimers
Oxides
Specific heat
Potassium
perovskite

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Cite this

Structural and magnetic properties of a new type of ordered oxygen-deficient perovskite, KMnVO 4 . / Yahia, Hamdi; Gaudin, E.; Lee, C.; Whangbo, M. H.; Darriet, J.

In: Chemistry of Materials, Vol. 19, No. 23, 13.11.2007, p. 5563-5569.

Research output: Contribution to journalArticle

Yahia, Hamdi ; Gaudin, E. ; Lee, C. ; Whangbo, M. H. ; Darriet, J. / Structural and magnetic properties of a new type of ordered oxygen-deficient perovskite, KMnVO 4 In: Chemistry of Materials. 2007 ; Vol. 19, No. 23. pp. 5563-5569.
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