Effect of iodine intercalation on structural and physical properties of misfit cobaltates

• Published in: Journal of magnetism and magnetic materials Vol. 310; no. 2; pp. 1116 - 1118
• Main Authors: Kato, M., Umehara, K., Goto, Y., Hirota, K., Yoshimura, K.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.03.2007; Elsevier Science
• Subjects: Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Iodine intercalation; Misfit cobaltates; Physics; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Triangular Co lattice; 75.50.Ee; Triangular Co lattice; 75.45.+j; Iodine intercalation; Misfit cobaltates; Partial pressure; Synthesis; Triangular lattices; Cobalt oxides; Intercalation compounds; Heat treatments; Structural analysis
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2006.10.305

We have studied the synthesis and physical properties of misfit cobaltates compounds intercalated by the iodine. The iodine atoms was successfully intercalated into the misfit cobaltates by the heat treatment at a constant iodine partial pressure. In the case of Bi(Pb)–Sr–Co–O system, I α Bi 2 - x Pb x Sr 2 Co 2 O y , it was found that the c-axis drastically increased by the intercalation. The iodine content α was determined to be 0.97 for Pb content x = 0 , and 0.81–0.85 for x > 0.4 . From magnetic and electric measurements for these compounds, it was suggested that the intra-layer couplings between CoO 2 layers are probably reduced by the iodine intercalation.