Artículo
High Temperature Coercivity of Nb-containing HITPERM Alloys: Effect of Cu Addition
Autor/es | Blázquez Gámez, Javier Sebastián
Franco García, Victorino Conde Amiano, Clara Francisca Conde Amiano, Alejandro Ferenc, J. Kulik, T. |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2008 |
Fecha de depósito | 2023-06-02 |
Publicado en |
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Resumen | Hysteresis loops of nanocrystalline samples of Fe39Co39Nb6B16 - yCuy (y = 0, 1) HITPERM-type alloys were measured from room temperature up to 773K. The alloy with Cu shows a nearly constant value of coercivity (∼ 135A/m) ... Hysteresis loops of nanocrystalline samples of Fe39Co39Nb6B16 - yCuy (y = 0, 1) HITPERM-type alloys were measured from room temperature up to 773K. The alloy with Cu shows a nearly constant value of coercivity (∼ 135A/m) in all the studied temperature range, whereas for the Cu-free alloy, the coercivity increases from 125A/m at 300K up to 190A/m at 773K. Room temperature Mössbauer spectra can be interpreted on the basis of the presence of three different regions: amorphous, crystalline and interface. The observed nanocrystalline microstructure is similar for the two alloys, although bigger crystallites are found in the alloy without Cu. The very small grain size ensures the averaging out of the magnetocrystalline anisotropy but, as the expected value of magnetostriction constant for the crystalline phase is ∼ 60ppm, the magnetoelastic anisotropy cannot be neglected. |
Agencias financiadoras | Gobierno de España European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) |
Identificador del proyecto | MAT 2004-04618 |
Cita | Blázquez Gámez, J.S., Franco García, V., Conde Amiano, C.F., Conde Amiano, A., Ferenc, J. y Kulik, T. (2008). High Temperature Coercivity of Nb-containing HITPERM Alloys: Effect of Cu Addition. Materials Letters, 62 (4-5), 780-783. https://doi.org/10.1016/j.matlet.2007.06.067. |
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