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oai:docta.ucm.es:20.500.14352/520972023-08-25T17:44:32Zcom_20.500.14352_14col_20.500.14352_15

Magnetic transition in nanocrystalline soft magnetic alloys analyzed via ac inductive techniques Gómez Polo, Cristina Pérez Landazabal,, J. I. Recarte, Vicente Vazquez, M. Hernando Grande, Antonio ©2004 The American Physical Society. This work was supported by the Spanish Gobierno de Navarra under project “Propiedades de magnetotransporte de nuevos materiales nanoestructurados.” The magnetic transition in a FeSiBCuNb nanocrystalline alloy, associated with the decoupling of ferromagnetic crystallites around the Curie point of the residual amorphous matrix, is analyzed in this work through the temperature dependence of the ac axial magnetic permeability and impedance of the samples. The temperature dependence of both complex magnitudes presents a maximum in the irreversible contribution at a certain transition temperature. While for low values of the exciting ac magnetic field the transition temperature lies below the Curie temperature of the amorphous phase, a shift above this Curie point is observed increasing the amplitude of the applied ac magnetic field. The detected field dependence is interpreted taking into account the ac nature of the inductive characterization techniques and the actual temperature dependence of the coercivity of the samples. 2023-06-20T12:39:33Z 2023-06-20T12:39:33Z 2004-09 journal article 1098-0121 10.1103/PhysRevB.70.094412 https://hdl.handle.net/20.500.14352/52097 http://dx.doi.org/10.1103/PhysRevB.70.094412 https://journals.aps.org eng open access American Physical Society