Engineering Magnetic Properties of Nanostructures via Size Effects and Interphase Interactions

Aggregates of Mn2+ Ions in Mesoporous Self-Assembled Cubic ZnS:Mn Quantum Dots: Composition, Localization, Structure, and Magnetic Properties

“…37 If such magnetic clusters, most probably consisting of Mn 2+ ions, are large enough, they become superparamagnetic at higher temperatures, above the blocking temperature T B < 50 K, while at T < T B they give rise to the observed increase in the saturation magnetization in the highly doped sample. Moreover, a very large dispersion in the size of such clusters is expected and, as a consequence, many of the finest clusters might have blocking temperatures below 2 K, which could therefore also contribute to the paramagnetic susceptibility.…”

Magnetic Nanoparticle Systems for Nanomedicine—A Materials Science Perspective

“…Magnetic nanoparticle systems that are relevant for nanomedicine applications [1,2], such as biomedical imaging, magnetically targeted drug delivery, magneto-mechanical actuation of cell surface receptors, magnetic hyperthermia, triggered drug release, and biomarker/cell separation, have some particular features concerning composition, size, morphology, structure, and magnetic behavior, which highly motivated the synthesis, characterization, and post-synthesis application-specific modification of magnetic iron oxide and substituted ferrite nanoparticles [3][4][5][6][7][8][9][10]. These multi-functional magnetoresponsive particles are highly promising in imaging and treating a lesion, simultaneously providing a theranostic approach [11][12][13].…”

Reconstruction of superparamagnetic particle grain size distribution from Romanian loess using frequency dependent magnetic susceptibility and temperature dependent Mössbauer spectroscopy

“…Hu et al, 2015). Finally, for very fine nanoparticles, the unsatisfied bonds at the particle surface are always susceptible to induce much dispersed values of the exchange interaction and hence very rapidly relaxing local positions (Kuncser et al, 2014). In Mössbauer spectroscopy information about non-perfectly identical surroundings, local defects and vacancies are reflected mainly in the width of the magnetic hyperfine field distribution or alternatively in the width of the sextet spectral line (Culita et al, 2013).…”