YCrWO6: Polar and Magnetic Oxide with CaTa2O6-Related Structure

Sun Woo Kim, Thomas J. Emge, Zheng Deng, Ritesh Uppuluri, Liam Collins, Saul H. Lapidus, Carlo U. Segre, Mark Croft, Changqing Jin, Venkatraman Gopalan, Sergei V. Kalinin, Martha Greenblatt

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A new polar and magnetic oxide, YCrWO6, was successfully synthesized and characterized. YCrWO6 crystallizes in polar orthorhombic space group Pna21 (no. 33) of edge-sharing dimers of CrO6 and WO6 octahedra, which are connected by corner-sharing to form a three-dimensional framework structure with Y3+ cations located in the channels. The structure of YCrWO6 is related to that of CaTa2O6; however, the ordering of Cr3+ and W6+ in the octahedral sites breaks the inversion symmetry of the parent CaTa2O6 structure. X-ray absorption near edge spectroscopy of YCrWO6 confirmed the oxidation state of Cr3+ and W6+. Temperature-dependent optical second harmonic generation measurements on YCrWO6 confirmed the noncentrosymmetric character and evidenced a noncentrosymmetric-to-centrosymmetric phase transition above 800 °C. Piezoresponse force microscopy measurements on YCrWO6 at room temperature show strong piezoelectric domains. Magnetic measurements of YCrWO6 indicate antiferromagnetic order at TN of -22 K with Weiss temperature of -34.66 K.

Original languageEnglish (US)
Pages (from-to)1045-1054
Number of pages10
JournalChemistry of Materials
Issue number3
StatePublished - Feb 13 2018

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering
  • Materials Chemistry


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