Amb motiu del tancament d'estiu, la validació de documents es reprendrà a partir del 28 d'agost de 2026. Disculpeu les molèsties.
Con motivo del cierre de verano, la validación de documentos se reanudará a partir del 28 de agosto de 2026. Disculpad las molestias
Due to the summer closure, document validation will resume starting August 28, 2026. We apologize for any inconvenience.

Files

153357.pdf (532.71 KB)

Document type

Article

Version

Published version

Publication date

2000

All rights reserved

Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/22082

Antiferromagnetic correlations in Fe-Cu granular alloys: the role of the surface structure

Journal Title

Authors

Director/Tutor

Journal ISSN

Volume Title

Related resource

http://doi.org/10.1063/1.364778

Abstract

Fe precipitates in a Cufcc matrix, prepared using the Bridgeman method and with an average composition of Cu97Fe3, displayed the coexistence of ferromagnetism ~FM!, spin glass-like ~SGL! behavior and antiferromagnetic ~AFM! correlations. The two former contributions may be attributed, respectively, to the segregation of FM, a-Febcc precipitates and to the few Fe spins distributed in the matrix. The annealing procedures increased the FM contribution and, as particle growth and phase segregation took place, the SGL behavior progressively disappeared. Results from high resolution transmission electron microscopy ~HRTEM!, x-ray photoelectron spectroscopy ~XPS!, and electron energy-loss spectroscopy ~EELS! suggest that the AFM correlations are due to the a-Fe particles that show a surface layer of a few nanometers in thickness, of either FeO and/or g-Fefcc . XPS and EELS measurements confirm the presence of FeO; however, the latter is only tentatively suggested by the HRTEM analysis of the particle/matrix interfaces.

Subject

Aliatges, Ferromagnetisme, Superfícies (Física), Metalls, Magnetisme, Cristallografia, Histèresi, Propietats magnètiques

Subject (English)

Ferromagnetism, Surfaces (Physics), Metals, Magnetism, Crystallography, Hysteresis, Magnetic properties

Citation

Collections

Articles publicats en revistes (Física de la Matèria Condensada)

Citation

BATLLE GELABERT, Xavier, et al. Antiferromagnetic correlations in Fe-Cu granular alloys: the role of the surface structure. Journal of Applied Physics. 2000. Vol. 87, num. 6, pags. 3037-3043. ISSN 0021-8979. [consulted: 16 of August of 2026]. Available at: https://hdl.handle.net/2445/22082

Export metadata

JSON - METS

Share record