**Characterization of Magnetic Phases in Nanostructured Ferrites by Electron Spin Resonance**

Rebeca Díaz-Pardo and Raúl Valenzuela

Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/61508

### **Abstract**

This chapter is dedicated to the analysis of the spin resonance response (ESR) of different magnetic phases, in nanoparticles (NPs) of magnetic oxides, or ferrites. Evidence of the correlations between resonance spectrum and magnetic structure has been published, of course, in many works; however, to our knowledge, it is somewhat scattered and not easily accessible. We have chosen to carry out this analysis mainly on ferrite NPs because these magnetic materials exhibit a wide variety of magnetic properties, and as a conse‐ quence, a large diversity of classic and novel applications in technological fields ranging from electronics to biomedics.

**Keywords:** EPR, FMR, ESR, Nanoparticles, Ferrites
