Abstract
The electrical resistance and magnetic properties of Fe85−xCrxB15 (0 ≦ x ≦ 21.5) amorphous alloys are measured in a wide temperature range. The Curie and the crystallization temperatures are determined also from the temperature dependence of the resistance. The exchange constant, the mean magnetic moment, the TCR (temperature coefficient of the resistance), and the crystallization temperature have different concentration dependence below and above 10 at% Cr content. This can be attributed to different magnetic structure and chemical and/or topological short range order below and above this concentration. Der elektrische Widerstand und einige magnetische Parameter von amorphen Fe85−xCrxB15 (0 ≦ x ≦ 21,5) Legierungen werden in einem weiten Temperaturgebiet gemessen. Die Curie- und Kristallisationstemperaturen werden ebenfalls aus der Temperaturabhängigkeit des Widerstandes bestimmt. Die Austauschkonstante, das mittlere magnetische Moment, der TCR (Temperaturkoeffizient des Widerstandes) und die Kristallisationstemperatur zeigen verschiedene Konzentrationsabhängigkeiten unterhalb und oberhalb 10 At% Cromgehalt. Dies wird der verschiedenen magnetischen und chemischen Struktur und/oder topologischen Nahordnung unterhalb und oberhalb dieser Konzentration zugeordnet.
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