Journal of Applied Physics · 2013 · 42 citations · 11 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramic MaterialsCondensed Matter PhysicsMagnetic MaterialsFerrimagnetic MaterialsMagnetic AnisotropyMagnetic CeramicsMagnetic OxidesMagnetic Properties Of SolidsMicrowave MaterialsAnisotropy FieldAnisotropy In FerritesCrystallographic TextureCrystallographic Texture AnalysisFerritesHexaferritesMagnetic Materials CharacterizationMicrowave Devices
We report the magnetic and structural properties of a series of W-type barium hexaferrites of composition BaZn2−xCoxFe16O27, where x = 0.15, 0.20, and 0.25. The anisotropy field of these barium ferrites (BaW) decreased with the substitution of divalent Co ions, while they maintained crystallographic c-axis texture. The measured anisotropy field was ∼10 kOe, and a hysteresis loop squareness Mr/Ms = 79% was obtained due to well-controlled grain size within the range of single domain scale. These two properties make the BaW suitable for applications in microwave devices at lower frequencies, such as self-biased circulators operated at X-band frequencies.
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