132258 20240301161207.0 doi 10.1103/PhysRevB.84.104427 sideral 74728 ART-2011-74728 eng Silva, N. J. O. Shifted loops and coercivity from field-imprinted high-energy barriers in ferritin and ferrihydrite nanoparticles 2011 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 intraparticle 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. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/MICINN/CSD2006-00012 info:eu-repo/grantAgreement/ES/MICINN/CSD2007-00010 info:eu-repo/grantAgreement/ES/MICINN/MAT2007-61621 info:eu-repo/grantAgreement/ES/MICINN/MAT2009-08667 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 3.691 2011 PHYSICS, CONDENSED MATTER 13 / 68 = 0.191 2011 Q1 T1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Amaral,V. S. Urtizberea,A. (orcid)0000-0002-8424-9780 Bustamante,R. Millán,A. Universidad de Zaragoza (orcid)0000-0003-0828-3212 Palacio,F. (orcid)0000-0002-6403-7270 Kampert,E. Zeitler,U. De Brion,S. Iglesias,A. A. Labarta,A. 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 84, 10 (2011), 104427 [7 pp] Phys. Rev. B, Condens. matter mater. phys. Physical review. B, Condensed matter and materials physics 1098-0121 415242 http://zaguan.unizar.es/record/132258/files/texto_completo.pdf Versión publicada 2796351 http://zaguan.unizar.es/record/132258/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:132258 articulos driver 2024-03-01-14:53:22 ARTICLE