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• 作者：Ngozi E. Amuneke ; Joshua Tapp ; Clarina R. de la Cruz ; Angela M枚ller
• 刊名：Chemistry of Materials
• 出版年：2014
• 出版时间：October 28, 2014
• 年：2014
• 卷：26
• 期：20
• 页码：5930-5935
• 全文大小：356K
• ISSN：1520-5002

文摘

AAgb>2b>Fe[VOb>4b>]b>2b> with A = K or Rb was synthesized by solid state methods and characterized by thermodynamic properties measurements (N茅el order at Tb>Nb> 鈮?3.0 K). The respective nuclear (a^K,Rb = 5.48 脜, c^K = 7.212 脜, c^Rb = 7.357 脜, P3虆, Z = 1) and magnetic structures were refined using neutron diffraction in applied magnetic fields. The results indicate enhanced structural stability of the P3虆 structure and the realization of a frustrated triangular lattice with antiferromagnetic XY-anisotropies. Two magnetic structures were identified: a helical and chiral Y-phase with a propagation vector of (1/3, 1/3, 鈮?0.39) and a commensurate up鈥搖p鈥揹own phase. These unique compounds offer convenient experimental access for optimizing the features and properties of ferroaxial multiferroic materials.