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Single-crystal growth and anisotropic magnetic properties of nonstoichiometric three-layer sodium cobalt oxides

Journal Article


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Abstract


  • Large single crystals of -NaxCoO2 (x=0.91, 0.92, and 0.93) have been successfully fabricated by using the traveling solvent floating zone method. Details on the crystal growth are discussed. The crystal structures were characterized using powder x-ray diffraction and Rietveld refinement. The magnetic susceptibility measurements show that the magnetic properties depend strongly on x. The compound was found to be antiferromagnetic at TN20 K for x=0.91 and x=0.92, and paramagnetic for x=0.93. The in-plane and out-of-plane anisotropies were observed for the x=0.91 crystals. In addition, the derived anisotropic g-factor ratios (gab/gc) from the anisotropic susceptibility along Hab and Hc decreased significantly as the sodium composition increased from x=0.91 to x=0.93.

    é2007 The American Physical Society

UOW Authors


Publication Date


  • 2007

Citation


  • Chen, D., Wang, X., Lin, C. & Dou, S. Xue. (2007). Single-crystal growth and anisotropic magnetic properties of nonstoichiometric three-layer sodium cobalt oxides. Physical Review B (Condensed Matter and Materials Physics), 76 134511-1-134511-6.

Scopus Eid


  • 2-s2.0-35448955638

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1171&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/172

Has Global Citation Frequency


Start Page


  • 134511-1

End Page


  • 134511-6

Volume


  • 76

Abstract


  • Large single crystals of -NaxCoO2 (x=0.91, 0.92, and 0.93) have been successfully fabricated by using the traveling solvent floating zone method. Details on the crystal growth are discussed. The crystal structures were characterized using powder x-ray diffraction and Rietveld refinement. The magnetic susceptibility measurements show that the magnetic properties depend strongly on x. The compound was found to be antiferromagnetic at TN20 K for x=0.91 and x=0.92, and paramagnetic for x=0.93. The in-plane and out-of-plane anisotropies were observed for the x=0.91 crystals. In addition, the derived anisotropic g-factor ratios (gab/gc) from the anisotropic susceptibility along Hab and Hc decreased significantly as the sodium composition increased from x=0.91 to x=0.93.

    é2007 The American Physical Society

UOW Authors


Publication Date


  • 2007

Citation


  • Chen, D., Wang, X., Lin, C. & Dou, S. Xue. (2007). Single-crystal growth and anisotropic magnetic properties of nonstoichiometric three-layer sodium cobalt oxides. Physical Review B (Condensed Matter and Materials Physics), 76 134511-1-134511-6.

Scopus Eid


  • 2-s2.0-35448955638

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1171&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/172

Has Global Citation Frequency


Start Page


  • 134511-1

End Page


  • 134511-6

Volume


  • 76