Published in

American Physical Society, Physical review B, 10(84), 2011

DOI: 10.1103/physrevb.84.104427

Links

Tools

Export citation

Search in Google Scholar

Shifted loops and coercivity from field imprinted high energy barriers in ferritin and ferrihydrite nanoparticles

Journal article published in 2010 by N. J. O. Silva ORCID, V. S. Amaral, A. Urtizberea, R. Bustamante, A. Millán, S. de Brion, F. Palacio, E. Kampert ORCID, U. Zeitler, Sophie De Brion, S. de Brion, Òscar Iglesias, Ò. Iglesias, O. Iglesias, Amílcar Labarta ORCID
This paper is available in a repository.
This paper is available in a repository.

Full text: Download

Green circle
Preprint: archiving allowed
Upload
Green circle
Postprint: archiving allowed
Upload
Green circle
Published version: archiving allowed
Upload
Policy details
Data provided by SHERPA/RoMEO

Abstract

We show that the coercive field in ferritin and ferrihydrite depends on the maximum magnetic field in a hysteresis loop and that coercivity and loop shifts depend both on the maximum and cooling fields. In the case of ferritin we show that the time dependence of the magnetization also depends on the maximum and previous cooling fields. This behavior is associated to changes in the intra-particle energy barriers imprinted by these fields. Accordingly, the dependence of the coercive and loop shift fields with the maximum field in ferritin and ferrihydrite can be described within the frame of a uniform-rotation model considering a dependence of the energy barrier with the maximum and the cooling fields. ; Comment: 8 pages, 5 figures. Accepted for publication in Phys. Rev. B. Final version with improved writing and figures