Structural and physical properties of heavily doped yttrium vanadate: Y0.6Cd0.4VO3

Alexei A. Belik, Masahiro Nagao, Masaki Azuma, Mikio Takano, Yoshio Matsui, Eiji Takayama-Muromachi

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Abstract

Structural properties of Y0.6Cd0.4VO3 were investigated by electron diffraction and laboratory and synchrotron X-ray powder diffraction methods. Y0.6Cd0.4VO3 crystallizes in space group Pnma (GdFeO3type perovskite structure) between 12 and 300 K (a = 5.45887(3) Å, b = 7.57250(4) Å, and c = 5.27643(2) Å at 300 K). The lattice parameters showed anomalous behavior on temperature. The c parameter linearly decreased from 12 to 120 K, and then it lineally increased from 160 to 300 K. The b parameter was constant between 12 and 120 K, demonstrated a drop from 120 to 200 K, and then lineally increased from 200 to 300 K. The cla ratio had a rather sharp maximum at 150 K. In Y 0.6Cd0.4VO3 the V-O distances in the ac plane began to split to shorter and longer ones below 150 K, indicating that orbital fluctuations are involved. The phase transition near 150 K in Y 0.6Cd0.4VO3 is accompanied by a broad anomaly on the specific heat and change of the slope of the inverse magnetic susceptibility. Other members of the Y1-xCdxVO3 solid solution with x = 0.3, 1/3, and 0.5 did not show this kind of phase transition. This kind of a phase transition has never been detected in other doped vanadates, R1-xMxVO3 (R = Y and rare earths and M-Ca and Sr).

Original languageEnglish
Pages (from-to)5246-5252
Number of pages7
JournalChemistry of Materials
Volume20
Issue number16
DOIs
Publication statusPublished - 2008 Aug 26
Externally publishedYes

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ASJC Scopus subject areas

  • Materials Chemistry
  • Materials Science(all)

Cite this

Belik, A. A., Nagao, M., Azuma, M., Takano, M., Matsui, Y., & Takayama-Muromachi, E. (2008). Structural and physical properties of heavily doped yttrium vanadate: Y0.6Cd0.4VO3. Chemistry of Materials, 20(16), 5246-5252. https://doi.org/10.1021/cm800934e