Artículo
Analysis of the magnetoresistance contributions in a nanocrystallized Cr-doped FINEMET alloy
Autor/es | Kiss, L.F.
Franco García, Victorino Csontos, M. Péter, L Conde Amiano, Clara Francisca Conde Amiano, Alejandro Kemény, T. Tóth, J. Varga, L.K. Bakonyi, I. |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2011 |
Fecha de depósito | 2019-02-18 |
Publicado en |
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Resumen | The magnetoresistance (MR) was measured at 200, 250 and 300 K in magnetic fields up to B=12 T for a nanocrystallized Fe63.5Cr 10Nb3Cu1Si13.5B9 alloy. Both the longitudinal (LMR) and transverse (TMR) component of the ... The magnetoresistance (MR) was measured at 200, 250 and 300 K in magnetic fields up to B=12 T for a nanocrystallized Fe63.5Cr 10Nb3Cu1Si13.5B9 alloy. Both the longitudinal (LMR) and transverse (TMR) component of the magnetoresistance decreased from B=0 to about 0.1 T. This could be ascribed to a giant MR (GMR) effect due to spin-dependent scattering of conduction electrons along their path between two FeSi nanograins via the non-magnetic matrix. Such a scattering may occur if the nanograin moments are not or only weakly coupled in the absence of a strong exchange coupling (due to the high Cr content in the matrix) and/or only weak dipoledipole coupling is present (due to sufficiently large separations between the nanograins). For larger fields, the GMR saturated and a slightly nonlinear increase in MR with B was observed due to a contribution by the residual amorphous matrix. The anisotropic MR effect (AMR≡LMR-TMR) was negative for all fields and temperatures investigated. By measuring the MR of melt-quenched Fe100-xSix solid solutions with x=15, 18, 20, 25 and 28, the observed AMR could be identified as originating from the FeSi nanograins having a D03 structure. |
Identificador del proyecto | T 038383
TéT E-21/04 MAT 2007-65227 P06-FQM-01823 |
Cita | Kiss, L.F., Franco García, V., Csontos, M.P., Conde Amiano, C.F., Conde Amiano, A., Kemény, T.,...,Bakonyi, I. (2011). Analysis of the magnetoresistance contributions in a nanocrystallized Cr-doped FINEMET alloy. Journal of Magnetism and Magnetic Materials, 323, 699-707. |
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