Structural and millimeter-wave characterization of flux grown Al substituted barium hexaferrite single crystals
Source abstract
Abstract
Abstract Single crystals of barium hexaferrites with compositions BaFe 12 O 19 and BaFe 11.5 Al 0.5 O 19 were grown from carbonate flux. The Al substitution results in a reduction of the unit cell volume from 697.54(7) A 3 for unsubstituted hexaferrite to 695.93(3) A 3 for the Al-substituted phase and the Curie temperature from 450 to 420 °C. The magnetization of BaFe 11.5 Al 0.5 O 19 samples was measured between 3 and 300 K in external magnetic fields of 0.001 and 0.05 T. The temperature dependence of the magnetization at a magnetic field of 0.001 T demonstrates irreversibility, which disappeared at 0.05 T field. Millimeter-wave characterization of BaFe 11.5 Al 0.5 O 19 slabs loaded in a WR-10 waveguide was carried out in the frequency range of 75 to 100 GHz. In this range electromagnetic resonances were observed at the frequencies of 78.6 GHz and 96.3 GHz. The resonant microwave absorption level was controlled by value of bias magnetic field.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic Properties and Synthesis of Ferrites · Electromagnetic wave absorption materials · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (43)
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