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Gómez Nicola, Ángel ; Cebollada, F. ; Palomares, F. J. ; Sánchez, N. ; González Herrera, Elvira María ; González, J. M. ; Vicent López, José Luis | American Institute of Physics | 2014-03-10In this work, we improve the ability to tailor the switching mechanism in nanomagnets by introducing an additional, highly controlled source of anisotropy: magnetocrystalline anisotropy. We analyze the vortex dynamics in single crystal Fe nanotr[...]texto impreso
Prados, C. ; Crespo del Arco, Patricia ; González, J. M. ; Hernando Grande, Antonio ; Marcos, J. F. ; Gancedo, R. ; Grobert, N. ; Terrones, M. ; Walton, R. M. ; Kroto, H. W. | American Physical Society | 2002-03-15The phase distribution of high aspect ratio, Fe-filled carbon nanotubes prepared by pyrolyzing a mixture of powered ferrocene and C_(60) has been determined by means of Mössbauer spectroscopy. Our results for that characterization are closely re[...]texto impreso
González Herrera, Elvira María ; Montero, M. I. ; Cebollada, F. ; De Julián Fernández, C ; Vicent López, José Luis ; González, J. M. | E D P Sciences | 1998-04-01We analyze the magnetic properties of mechanically ground nanosized Ni particles dispersed in a SiO_2 matrix. Our magnetic characterization of the as-milled samples show the occurrence of two blocking processes and that of non-monotonic milling [...]texto impreso
Crespo del Arco, Patricia ; González, J. M. ; Hernando Grande, Antonio ; Ynduráin, F. J. | American Physical Society | 2004-01It has been found that in highly anisometric ribbon-shaped Fe particles with nanoscale dimensions that the magnetization decreases with temperature markedly faster than in bulk bcc Fe. This anomalous dependence, which becomes more remarkable as [...]
