Title :
Dipolar interactions in hard-soft nanocomposites
Author :
González, J.M. ; Montero, M.I. ; Raposo, V. ; Crespo, P. ; Marín, P. ; Hernando, A.
Author_Institution :
Inst. de Ciencia de Mater., CSIC, Madrid, Spain
fDate :
9/1/2000 12:00:00 AM
Abstract :
We report on the hysteretic behavior of nanocomposite samples formed by Fe and Ba hexaferrite particles. Our most interesting result corresponds to the observation of a loop displacement (in the sense of the negative fields) which depended in a complex way on the composition of the samples. That result was supported by the observation of measurable differences between the high field values of the isothermal and demagnetization remanences. We discuss our experimental data in terms of the characteristics of the dipolar field created into the Fe regions by the hard Ba hexaferrite particles
Keywords :
barium compounds; composite materials; demagnetisation; iron; magnetic hysteresis; magnetic particles; nanostructured materials; permanent magnets; remanence; soft magnetic materials; Fe-BaFe12O19; Fex/(BaFe12O19)1-x; demagnetization remanence; dipolar interactions; hard-soft nanocomposites; hexaferrite particles; hysteretic behavior; isothermal remanence; loop displacement; negative fields; Demagnetization; Iron; Isothermal processes; Magnetic field measurement; Magnetic hysteresis; Magnetic materials; Magnetic properties; Nanocomposites; Optical microscopy; Remanence;
Journal_Title :
Magnetics, IEEE Transactions on
