An Order-Disorder Transformation Phenomenon in the FeTiO_3-Fe_2O_3 Solid Solution Series

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概要

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• The effects of heat treatments on the magnetic properties of the synthesized solid solution xFeTiO_3-(1-x)Fe_2O_3 of ilmenite and hematite were examined in detail for compositions x around 0.5. It was confirmed that a transformation from an ordered state (ferrimagnetic one) into a disordered state (antiferromagnetic one) takes place cooperatively at a distinct transition point. This transformation temperature is lowered with decrease in the ilmenite content from 1100℃ for x = 0.65 to 600℃ for x = 0.45. The completely disordered specimens could not be obtained for the composition x ≧ 0.6 by the quench method while the completely ordered state could not be attained in the specimens with x ≦ 0.5 because of decrease of the transformation temperature for these specimens and a reduction of the rate of ion diffusion at such low temperatures. The results obtained were discussed by using the Bragg-Williams approximation. It was noted briefly that the reverse thermo-remanent magnetism found in this system is closely related to the order-disorder transformation phenomenon which exists in this system.

• 社団法人日本物理学会の論文
• 1958-08-05

著者

• Ishikawa Yoshikazu

  Institute For Solid State Physics University Of Tokyo

• Ishikawa Yoshikazu

  Institute For Solid State Physics University Of Tokyo:(present)department Of Applied Physics Faculty

関連論文

• Neutron Diffraction Study of Antiferromagnetic MnTiO_3 and NiTiO_3
• Magnetic Property and Crystal Chemistry of Ilmenite (MeTiO_3) and Hematite (αFe_2O_3) System : II. Magnetic Property
• Magnetic Property and Crystal Chemistry of Ilmenite (MeTiO_3) and Hematite (αFe_2O_3) System : I. Crystal Chemistry
• Magnetic Properties of NiTiO_3-Fe_2O_3 SoIid Solntion Serics
• The Study on Substances having the Ilmenite Structure I. : Physical Properties of Synthesized FeTiO_3 and NiTiO_3 Ceramics
• Design of High Power Electromagnets
• Canted Spin Structure of β_1-MnZn
• A Study of the Low Temperature Transition in Magnetite
• Internal Magnetic Field in Ordered Fe_3 Al
• Magnetocrystalline Anisotropy and Magnetostriction of xFe_2TiO_4・(1-x)Fe_3O_4(x>0.5)
• Magnetocrystalline Anisotropy and Rotational Hysteresis in Lithium Substituied Magnetite
• Magnetostriction Constants of xFe_2TiO_4・(1-x)Fe_3O_4
• Magnetocrystalline Anisotropy of xFe_2TiO_4・(1-x)Fe_3O_4
• Antiferromagnetism of γ-FeMn Alloys. II. : Neutron Diffraction and Mossbauer Effect Studies
• Antiferromagnetism in Dilute Iron Chromium Alloys
• Effect of Heat Treatments on the Magnetic Properties of the FeTiO_3-Fe_2O_3 Solid Solution Series
• Antiferromagnetism of γ-FeMn Alloys. III. : Specific Heat and Thermoelectric Power Studies
• Neutron Diffraction Study of Cr-Rich Cr-Fe Alloy
• Magnetic Properties of the FeTiO_3-Fe_2O_3 Solid Solution Series
• Electrical Properties of FeTiO_3-Fe_2O_3 Solid Solution Series
• An Order-Disorder Transformation Phenomenon in the FeTiO_3-Fe_2O_3 Solid Solution Series
• Effective Use of Radiation and Thermal Shields in a Vacuum Furnace
• Antiferromagnetism of Dilute Cr Alloys with Co and Ni

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