INVESTIGATION OF A COMPOUND REPORTED AS BOTH FERRIMAGNETIC AND FERROELECTRIC,
Abstract
Shortly after the announcement of the discovery of a new electronic class of compounds with intrinsic ferrimagnetic-ferroelectric behavior, the question arose generally as to the possible presence of an undetected secondary phase as the real source of the magnetic properties. To resolve this question was the major objective of this investigation. To accomplish this, crystallographic, optical, magnetic and dielectric measurements were made as a function of sample composition and firing temperature. The major phase in the series of compounds investigated proved to be only paramagnetic, rather than ferrimagnetic as reported previously by other authors. Direct X-ray diffraction and optical evidence have shown definite ferromagnetic barium ferrite impurity to be present. Several trends in the magnetic properties were observed which indicated that all the so-called ferrimagnetic properties were entirely accounted for by the presence of 1/2%, or less, of this impurity. The ferroelectric properties, on the other hand, appear to be intrinsic for certain x values, although complete saturation may not have been attained in the measurements. Of practical importance is the finding that the dielectric breakdown strength of this material is superior to TiO2 and BaTiO3 at partial cost to other electric properties. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1963
- Accession Number
- AD0416450
Entities
People
- W. J. Skudera Jr.
- W. W. Malinofsky
Organizations
- United States Army Communications-Electronics Command