2007 · 12 citations · 0 references
Natural SciencesMaterials EngineeringMaterials ScienceElectromagnetismMagnetic MaterialsNanomaterialsCarbon NanomaterialsFerrimagnetic MaterialsFerromagnetismMagnetic CharacterizationMagnetic NanomaterialsMagnetic Properties Of SolidsFerrimagnetic NanoparticlesFerrite NanoparticlesMagnetic NanoparticlesMagnetic PropertiesNanocrystalline Magnetic MaterialsNanomagnetismNanoparticlesParticle-size Distribution
Magnetic properties of two FeC samples with different amounts of carbon have been studied. In both cases, the amount of carbon was well above the mass sufficient to transform nanocrystalline iron into iron carbide (cementite). Through the dc magnetic and transmission electron microscopy (TEM) measurements it was shown that cementite nanoparticles formed agglomerates; the size distribution of these nanoparticles was very wide, and superparamagnetic-like behaviour was not observed even at room temperature.