Hexagonal Ferrites For Millimeter Wave Applications

Gordon R. Harrison

doi:10.1117/12.933111

2 August 1982 Hexagonal Ferrites For Millimeter Wave Applications

Gordon R. Harrison

Proceedings Volume 0317, Integrated Optics and Millimeter and Microwave Integrated Circuits; (1982) https://doi.org/10.1117/12.933111
Event: Integrated Optics and Millimeter and Microwave Integrated Circuits, 1981, Huntsville, United States

Abstract

Ferrimagnetic oxides with hexagonal crystal structures (referred to as hexagonal ferrites) are characterized primarily by their foliate (leaf-like or platelet) structure and high anisotropy fields. These properties allow for the preparation of polycrystalline grain oriented magnetic compounds with controlled values of anisotropy fields and attendant preferred direction of magnetization. These highly anisotropic aligned polycrystalline hexagonal ferrite compoundspossess built-in effective magnetic fields (up to 50 kilo-oersteds) in both uniaxial and planar structures, with associated electrical properties appropriate for many application considerations in signal control and processing components at millimeter wave frequencies. This paper reviews the crystal structures and the molecular engineering techniques utilized to prepare aligned uniaxial hexagonal compounds with controlled anisotropy fields up to values of 50 Koe. The properties of these compounds important to millimeter wave applications are summarized.

Citation Download Citation

Gordon R. Harrison "Hexagonal Ferrites For Millimeter Wave Applications", Proc. SPIE 0317, Integrated Optics and Millimeter and Microwave Integrated Circuits, (2 August 1982); https://doi.org/10.1117/12.933111

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