Consequences of Magnetic Interaction Phenomena in Granular Systems

L. M. SOCOLOVSKY; O. MOSCOSO LONDOÑO

Complex Magnetic Nanostructures

Springer

Año: 2017; p. 1 - 38

p { margin-bottom: 0.25cm; direction: ltr; color: rgb(0, 0, 0); line-height: 120%; }p.western { font-family: "Liberation Serif","Times New Roman",serif; font-size: 12pt; }p.cjk { font-family: "Droid Sans Fallback","Times New Roman"; font-size: 12pt; }p.ctl { font-family: "FreeSans","Times New Roman"; font-size: 12pt; }a.western:link { }a.ctl:link { }Magnetic interactionsin systems composed by nanoparticles in a matrix give place topeculiarities that are observable through magnetic andmagnetotransport measurements. In this article, we will present somebasic concepts and review a useful technique to characterize thosesystems, which is a class of magnetization versus temperaturemeasurement, ZFC-FC curves. With this tool in hand, we comment someresults on granular systems: diluted, interacting and percolatedsuperparamagnets. We also discuss how those magnetic features affectmagnetotransport properties like Giant Magnetoresistance, TunnelingMagnetoresistance and Giant Hall Effect.