Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió publicadaData de publicació
Tots els drets reservats
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/56294
Shifted loops and coercivity from field imprinted high energy barriers in ferritin and ferrihydrite nanoparticles
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
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.
Matèries
Matèries (anglès)
Citació
Citació
SILVA, N. j. o., AMARAL, V. s., URTIZBEREA, A., BUSTAMANTE, R., MILLÁN, A., PALACIO, F., KAMPERT, E., ZEITLER, U., BRION, Sophie de, IGLESIAS, Òscar, LABARTA, Amílcar. Shifted loops and coercivity from field imprinted high energy barriers in ferritin and ferrihydrite nanoparticles. _Physical Review B_. 2011. Vol. 84, núm. 104427-1-104427-7. [consulta: 25 de febrer de 2026]. ISSN: 1098-0121. [Disponible a: https://hdl.handle.net/2445/56294]