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We used a modified, two-step hydrothermal process to produce worm-shaped antiferromagnetic hematite-barium iron oxide particles and converted them to 25-45 nm spherical ferrimagnetic barium-ferrite (S-BaFe) nanoparticles for high-density magnetic recording media application. Saturation magnetization and coercivity of the S-BaFe nanoparticles were 50.7 emu/g and 4311 Oe, respectively. The thermal stability...
This letter reports the first demonstration of a monolithic heterostructure with a large electric tuning of the ferromagnetic resonance (FMR) at millimeter-wave frequencies. The structure is composed of a barium-strontium-titanate (BST) film and two thin platinum electrodes, all grown on a barium ferrite slab with in-plane uniaxial anisotropy. The electric tuning of the FMR responses around 60 GHz...
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