Magnetic Properties of Nanocrystalline Materials

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Abstract
The preparational routes for making nanocrystalline materials are briefly reviewed. Structural characteristics of nanomaterials are delineated. Magnetic properties, e.g. magnetization, coercivity, etc of nanoparticles of ferromagnetic metals are described and the effect of particle size thereon is discussed. Electron spin resonance (ESR) and nuclear magnetic resonance (NMR) techniques as used to investigate the effect of particle size on the energy level structure of various metals are elaborated. Lastly, the study of Mössbauer spectra of ultrafine particles of iron and related compounds is discussed in relation to their magnetic behaviour.