Fabrication of Textured Hematite via Topotactic Transformation of Textured Goethite

Textured hematite was fabricated from paramagnetic goethite by slip casting in a strong magnetic field followed by thermal treatment via topotactic phase transformation. The completely-textured hematite with the Lotgering factor F = 1 was obtained by sintering the goethite compact at 1200 °C. The a,b-axis of the goethite was taken over the c-axis of the hematite through the topotactic phase transformation. The textured hematite showed an anisotropic magnetic property depending on the direction of the crystalline orientation.