Structural and magnetic properties of the solid solution (0≤ x ≤ 1) YMn1-x(Cu3/4Mo1/4)xO3

Sylvie Malo, Antoine Maignan, Sylvain Marinel, Maryvonne Hervieu, Kenneth R. Poeppelmeier, Bernard Raveau

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Abstract

Recently, the ferroelectromagnet YMnO3 has been the focus of interest because it exhibits both antiferromagnetism (Néel temperature ∼80 K) and ferroelectricity (Curie temperature ∼914 K). There have been no reports of complete YMn1-xMxO3 solid solutions in which substitution of the foreign M cation preserves the hexagonal P63cm structure. In contrast there exist several homeotypic phases with the general formula, Ln1+nCunMO3+3n (n=1 (M=Ti), 2 (M=V) and 3 (M=Mo); Ln: lanthanide). Several YMn 1-x(Cu3/4Mo1/4)xO3 compounds have been synthesized. The solid solution, from YMnO3 (x=0) to YCu3/4Mo1/4O3 (x=1) has been characterized by X-ray diffraction and transmission electron microscopy study. For 0<x<0.9, the compounds are found to crystallize in the non-centrosymmetric structure, space group P63cm, of YMnO3. The Mn-free end member, x=1, crystallizes in a complex multiple cell, the superstructure being associated to Cu3+/Mo6+ cationic ordering. Dilution of the Mn3+ magnetic array by the paramagnetic (Cu2+) and diamagnetic (Mo6+) cations is found to decrease the antiferromagnetic ordering temperature and it becomes undetectable for x≥0.5 compositions.

Original languageEnglish
Pages (from-to)1492-1499
Number of pages8
JournalSolid State Sciences
Volume7
Issue number12
DOIs
Publication statusPublished - Dec 1 2005

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Keywords

  • Electron Microscopy
  • Hexagonal structure
  • Magnetic properties
  • Solid solution

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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