BaTiO3-CoFe2O4 composite films were prepared on (100) SrTiO3 substrates by using a radio-frequency magnetron co-sputtering method at 750 °C. These films contained highly (001)-oriented crystalline phases of perovskite BaTiO3 and spinel CoFe2O4, which can form a self-assembled nanostructure with BaTiO3 well-dispersed into CoFe2O4 under optimized sputtering conditions. A prominent dielectric perc...

Magnetic nanodiscs are fabricated by depositing cobalt onto 10–30 nm diameter silicon nanopillars, which were prepatterned using gold colloids as etch masks. The magnetic anisotropy energy of individual nanodiscs is studied by measuring the angular dependence of switching field using the micro-SQUID technique. The Stoner–Wohlfarth model, describing the magnetization reversal by unifom rotation,...

The general behavior of majrn»!it< (iron ferrite) at its low temperature transformation (ca 1!8°K) is reviewed. One of the properties which undergoes a largr change is the magnetocrystailine snisotropy, which is larger in magnitude and has a lower symmetry below the transformation. The magnetic symmetry axis below the transition tempeiature can be predetermined by cooling a single crystal throu...

Hard-magnetic barium ferrite (BF) nanoparticles with a hexagonal plate-like structure were used as an additive to carbonyl iron (CI) microparticle-based magnetorheological (MR) fluid. The morphology of the pristine CI and CI/BF mixture particles was examined by scanning electron microscopy. saturation magnetization coercivity values each particle measured in powder state vibrating sample magnet...

Magnetoelectric lead-free composite ceramic based on the piezoelecrtic Ba0.85Ca0.15Ti0.9Zr0.1O3 (BCZT) and magnetic NiCo0.02Cu0.02Mn0.1Fe1.8O4−d (NCCMF) has been obtained by solid state method using preliminarily synthesized solid-state precursors. X-ray diffraction measurements, microstructural, magnetic, dielectric, piezoelectric magnetoelectric studies have carried out. Impurity phases were ...

Epitaxial manganese substituted M-type barium ferrite thin films are deposited by alternating target laser ablation deposition (ATLAD) of BaFe O , Fe O , and MnFe O targets. The crystal structure and the epitaxy of the films are investigated by X-ray diffraction. Surface morphology is studied by atomic force microscopy. Magnetic properties of the films are characterized by vibrating sample magn...