Structure and Magnetic Properties of the α-NaFeO2-Type Honeycomb Compound Na3Ni2BiO6

Published

November 15, 2014

Author(s)

Elizabeth M. Seibel, J. H. Roudebush, Hui Wu, Qingzhen Huang, Mazhar N. Ali, Huiwen Ji, R. J. Cava

Abstract

We present the structure and magnetic properties of Na₃Ni₂BiO₆, which is an ordered variant of the α-NaFeO₂ structure type. This layered compound has a 2:1 ordering of (Ni²⁺/Bi⁵⁺)O₆ octahedra within the a-b plane and sodium in octahedra between the layers. The structure is presented in the space group C2/m, determined through a combination of single crystal X-ray, powder neutron, and powder X-ray diffraction. Temperature dependent magnetic susceptibility measurements show Na₃Ni₂BiO₆ to display long-range antiferromagnetic ordering below 11 K, despite the dominance of ferromagnetic interactions above T_N as indicated by a positive Weiss constant. Heat capacity measurements and low-temperature neutron diffraction support the magnetic ordering and are consistent with a TN of 10.4 K. A magnetic phase can be refined with (010) antiferromagnetic ordering along the b-axis in the honeycomb layer and moments aligned parallel to c. The compounds Na₃Mg₂BiO₆ and Na₃Zn₂BiO₆, synthesized as non-magnetic analogs of Na₃Ni_2BiOd6^, are briefly described.

Citation

Inorganic Chemistry

Volume

52

Pub Type

Journals

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Keywords

α-NaFeO2 structure, order/disorder, x-ray/neutron diffraction, magnetic phase transition

Citation

Seibel, E. , Roudebush, J. , Wu, H. , Huang, Q. , Ali, M. , Ji, H. and Cava, R. (2014), Structure and Magnetic Properties of the α-NaFeO₂-Type Honeycomb Compound Na₃Ni₂BiO₆, Inorganic Chemistry, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=914619 (Accessed May 2, 2024)