A family of one-dimensional oxides: Sr{sub 3}MIrO{sub 6}(M = Ni, Cu, Zn): Structure and magnetic properties
Journal Article
·
· Journal of Solid State Chemistry
- Massachusetts Institute of Technology, Cambridge, MA (United States)
The structures and magnetic properties of Sr{sub 3}ZnIrO{sub 6}, Sr{sub 3}CuIrO{sub 6} are presented. The structure of Sr{sub 3}NiIrO{sub 6} was solved by Rietveld analysis of powder neutron data. The structure refined in space group R3c, with a = 9.5806(1) and c = 11.1315(2) {angstrom}. The structure consists of infinite chains of alternating IrO{sub 6} octahedra and NiO{sub 6} trigonal prisms. The structures of Sr{sub 3}ZnIrO{sub 6} and Sr{sub 3}CuIrO{sub 6} are closely related to that of Sr{sub 3}NiIrO{sub 6}. Magnetic susceptibility studies show that Sr{sub 3}NiIrO{sub 6} undergoes complex magnetic transitions as a function of temperature and achieves a singlet ground state below 15 K. Low-temperature neutron diffraction does not show any evidence for structural changes. Magnetic susceptibility measurements of Sr{sub 3}CuIrO{sub 6} display ferromagnetic ordering below 40K. Measurements of the saturation magnetization at applied fields of up to 20 T display virtually no hysteresis loop, indicating that Sr{sub 3}CuIrO{sub 6} is a very soft ferromagnet. The saturation magnetization of 0.61 {mu}{sub {beta}} is lower than that expected for two unpaired electrons. Sr{sub 3}CuIrO{sub 6} orders antiferromagnetically. The data were fit to an alternating-chain Heisenberg model. The structures and magnetic properties of these one-dimensional oxides are discussed.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 146437
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 117; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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