Journal of Applied Physics · 1998 · 38 citations · 4 references
Natural SciencesMaterials EngineeringMaterials ScienceMagnetic MaterialsNanomaterialsNanotechnologyFerromagnetic MaterialsFerromagnetismMagnetic Materials SimulationMagnetic NanomaterialsMagnetic Properties Of SolidsNanocompositesGrain Size Effects On MagnetizationMagnetic Materials CharacterizationMaximum Energy ProductNanocrystalline Magnetic MaterialsNanomagnetismNanostructured FerromagnetsNanostructured Magnetic MaterialsNdfeb Magnets
The maximum energy products, (BH)max, of isotropic Nd-Fe-B-based nanocomposite magnets were calculated by a three dimensional model (10×10×10) that incorporated non-uniform magnetization reversals by subdivisions of the grains. Based on the results of our simulation, the largest obtainable (BH)max for a sample with 60% soft and 40% hard grains is about 290 kJ/m3. This value is lower than the previous crude estimate of 400 kJ/m3 but is almost twice as large as the experimental measured maximum of 160 kJ/m3 suggesting that further improvement in (BH)max is possible if the nanostructure of an actual magnet can made close to the theoretically ideal structure.
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