Structure and magnetism of the A site scandium perovskite (Sc 0.94Mn0.06)Mn0.65Ni0.35O 3 synthesized at high pressure

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

  • Chris I. Thomas
  • Matthew R. Suchomel
  • Giap V. Duong
  • Andrew M. Fogg
  • John B. Claridge
  • Matthew J. Rosseinsky

Organisaatiot

  • University of Liverpool

Kuvaus

Scandium perovskite (Sc0.94Mn0.06)Mn 0.65Ni0.35O3, synthesized at high pressure and high temperature, has a triclinic structure (space group P-1) at room temperature and ambient pressure with a v2a v p × 2ap × 2ap structure with α -90°, β -89°, γ -90°. Magnetic measurements show that the material displays Curie-Weiss behaviour above 50K with C= 2.11 emuKmol-1 (μeff =4.11μB per formula unit) and θ =-95.27 K. Bond valence sum analysis of the crystal structure shows that manganese is present in three different oxidation states (+2, +3, +4), with the +2 oxidation state on the A site resulting in a highly tilted perovskite structure (average tilt 21.2° compared with 15.7° calculated for LaCaMnNbO6), giving the formula (Sc3+ 0.94Mn2+ 0.06)(Mn4+ 0.41Mn3+ 0.09) (Mn3+ 0.15Ni2+ 0.35)O3.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli20130012
Sivut1-11
JulkaisuPHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A: MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
Vuosikerta372
Numero2013
TilaJulkaistu - 13 huhtikuuta 2014
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 12776487