Shifted loops and coercivity from field imprinted high energy barriers in ferritin and ferrihydrite nanoparticles - Condensed Matter > Materials ScienceReportar como inadecuado




Shifted loops and coercivity from field imprinted high energy barriers in ferritin and ferrihydrite nanoparticles - Condensed Matter > Materials Science - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: We show that the coercive field in ferritin and ferrihydrite depends on themaximum magnetic field in a hysteresis loop and that coercivity and loop shiftsdepend both on the maximum and cooling fields. In the case of ferritin we showthat the time dependence of the magnetization also depends on the maximum andprevious cooling fields. This behavior is associated to changes in theintra-particle energy barriers imprinted by these fields. Accordingly, thedependence of the coercive and loop shift fields with the maximum field inferritin and ferrihydrite can be described within the frame of auniform-rotation model considering a dependence of the energy barrier with themaximum and the cooling fields.



Autor: N. J. O. Silva, V. S. Amaral, A. Urtizberea, R. Bustamante, A. Millán, F. Palacio, E. Kampert, U. Zeitler, S. de Brion, Òscar I

Fuente: https://arxiv.org/







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