"The magnetic susceptibility and spontaneous magnetic moment of the perovskitic, polycrystalline solid solutions of BiFeO3 with PbTiO3, PbZrO3, and [50PbZrO3·50PbTiO3] were determined using the Faraday method. Pure BiFeO3 has a G-type antiferromagnetic structure. Although the perovskite BiFeO3 exhibits a sharp peak in the susceptibility at the Néel temperature, it does not possess a spontaneous magnetic moment. The solid solutions investigated possessed a spontaneous magnetic moment throughout the multiple cell rhombohedral region of the BiFeO3-PbTiO3-PbZrO3 ternary phase diagram, which extends from pure BiFeO3 to 75 to 80 percent BiFeO3 content on both sides and extends to nearly 50 percent BiFeO3 content in the center region. Except for some anomalous cases in the BiFeO3-PbTiO3 system, no spontaneous magnetic moments were observed outside the multiple cell rhombohedral region. Extrapolated values for the spontaneous moment for pure BiFeO3 ranged from 0.03 to 0.06 G cm3/g. For compositions containing from 10 to 60 percent BiFeO3, the susceptibility varied inversely with T+θ where T is the absolute temperature and θ is a positive constant. Thus, antiferromagnetic ordering was evident throughout the composition range.
Although BiFeO3 has been proposed as a material in which the electric and magnetic properties interact, no evidence was found to support this assertion"--Abstract, pages i-ii.
Gerson, Robert, 1923-2013
James, William Joseph
Lund, Louis H., 1919-1998
Johnson, Charles A.
McFarland, Charles E.
Ph. D. in Physics
U. S. Atomic Energy Commission
University of Missouri at Rolla
xiii, 224 pages
© 1967 James Ivan Latham, All rights reserved.
Dissertation - Open Access
Ferroelectric crystals -- Magnetic properties
Solids -- Magnetic properties
Crystals -- Magnetic properties
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Latham, James Ivan, "Magnetic properties of the BiFeO₃-PbTiO₃-PbZrO₃ ternary system" (1967). Doctoral Dissertations. 431.