Structural and Magnetic Studies of Hydrothermally Synthesized New Ferrites

概要

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Some ferromagnetic and antiferromagnetic new compounds are found to be formed under hydrothermal conditions. Structural and studies of the compounds are reported. By the heating Ba(OH)2 solution containing a-Fe2O3 powder in an autoclave, hexagonal crystal of BaO*2Fe2O3 is formed. The crystal and magnetic structures are investigated. Various efforts for substituting divalent and trivalent metal ions, such as Ni2+, Co2+, Cu2+, Al3+, and Cr3+, Fe3+ in the BaO*2Fe2O3 crystal have been unsuccessful. Instead, the other type of magnetic compounds are found to be formed. By heating sr(OH)2 solutions containing a-Fe2O3 or Cr2O3 Sr-hydrogarnets are formed. The structural and magnetic properties of the hydrogaruets are discussed.
長岡技術科学大学の論文
1983-01-31