Ferromagnetic/mictomagnetic transitions in Fe rich Fe1-xAlx alloys: A magnetoresistivity study

• Type: Article in International Conference Proceedings Book
• Date: 2006

Authors

amado, m. m. (Author) Other; braga, m. e. (Author) Other; schmool, d. (Author) FCUP; pereira, a. m. (Author) FCUP; moreira, j. m. (Author) Other; araujo, j. p. (Author) FCUP; sousa, j. b. (Author) FCUP; garitaonandia, j. s. (Author) Other; plazaola, f. (Author) Other

Conference proceedings International

Title: JOURNAL OF ALLOYS AND COMPOUNDS

Pages: 84-86

Fall Symposium on Multicomponent Alloys and Intermetallic Compounds for Magnetic Applications and Nanotechnology

Warsaw, POLAND, SEP 05-09, 2005

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-004-GHG

DOI: 10.1016/j.jallcom.2005.12.026

Abstract (EN): Magnetoresistance (MR) studies have been performed on Fe1-xAlx samples which exhibit unusual magnetic properties around x(c) similar to 0.3, where ferromagnetism sets in (for x < x(c)). Hysteretic, mictomagnetic and ferromagnetic structures are observed and the corresponding transition points are identified in three different Fe1-xAlx samples (x = 0.295, 0.300 and 0.305). A huge increase in the residual resistivity is observed for x similar to 0.305 (d rho(0)/dx similar to 181 mu Omega cm per 1% Al addition). The MR behaviour can be interpreted using a microscopic model based on ferromagnetic clusters, whose sizes vary with temperature within a paramagnetic matrix.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 3