title: Spin disorder scattering in magnetic metallic alloys.
abstract: Anomalous behavior of the resistivity at or just below the Néel temperature in antiferromagnetic metals is usually attributed to the formation of superzone gaps. However, we find that RMn12-xFex alloys which have no such gaps exhibit a similarly anomalous resistivity. We show that electron scattering by substitutional spin disorder can account for such behavior of itinerant magnets. This mechanism, which has not been studied before, leads to a relaxation rate that is proportional to x(12-x)m(2), where m is the staggered magnetization. Together with spin fluctuations, phonon, and impurity scattering, it accounts well for the resistivity data we obtain for HoMn12-xFex, for 0< or =x< or =9, in the temperature range of 4 to 400 K.
authors.affiliation: Instituto de Ciencia de Materiales de Aragón, Consejo Superior de Investigaciones Científicas and Universidad de Zaragoza, Spain. jolanta@posta.unizar.es
authors.forename: Jolanta
authors.initials: J
authors.lastname: Stankiewicz
authors.forename: Juan
authors.initials: J
authors.lastname: Bartolomé
authors.forename: Daniel
authors.initials: D
authors.lastname: Fruchart