The temperature versus concentration dependences of the magnetic susceptibility of liquid Fe, Ce; Co, Ce; Ni, Ce; Fe, Pr; Co, Pr; Ni, Pr; Fe, Sm; Fe, La; Co, La; and Ni, La alloys are given. Measurements are made by the Faraday method with the automatic pendulum scale in the temperature range from the melting point to 1650°C and REM concentrations of 0 to 100%. It is estimated that the concentration dependences of the magnetic susceptibitity have minima near equiatomic composition as a rule. The valent conditions of Ce, Pr, and Sm atoms in their alloys with Fe, Co, and Ni are estimated on the basis of the experimental data. It is found that the Ce atom valence in liquid alloys with Fe, Co, Ni, and also of Pr in melts with Co and Ni increases with increasing 3d‐metal concentration. It is noted that the delocalization effects in melts are more obvious that in the similar solid systems.
The magnetic susceptibility of Co-Xi and Co-Ge alloys is investigated by the Faraday method with the help of the pendulum scale in the temperature range 900 to 1800 "C. It is shown that the Curie-Weiss law is fulfilled both for solid and liquid alloys with Xi (Ge) concentrations up to 30 at?;. For these alloys the number of noncoupled spins per Co atom and the paramagnetic Curie temperature are calculated after determination of the temperature-independent contribution to the magnetic susceptibility. Considering the possible localization of 3d-electrons, a band model of Co alloys is proposed. Basing on this model and considering the connection of the nearest order in the alloys with the crystalline structure of the solid state, the magnetic properties of both solid and liquid alloys are explained.Die magnetische Suszeptibilitiit von Co-Si-und Go-Ge-Legierungen wird mit der Faraday-Methode im Temperaturbereich von 900 bis 1800 "C untersucht. Es wird gezeigt, daB das Curie-WeiSsche Gesetz sowohl fur feste als auch fur flussige Legierungen mit Si (Ge)-Konzentrationen bis zu 30 Atyo erfiillt ist. Fur diese Legierungen werden die Anzahl der ungekoppelten Spins pro Co-Atom und die paramagnetische Curietemperatur nach der Bestimmung des temperaturunabhiingigen Beitrags zur magnetischen Suszeptibilitlit berechnet. Unter Beriicksichtigung der moglichen Lokalisierung der 3d-Elektronen wird ein Biindermodell von Co vorgeschlagen. Auf der Grundlage dieses Modells und unter Beriicksichtigung der Verbindung der Nahordnung in den Legierungen mit der Kristallstruktur des Festkorpers werden die magnetischen Eigenschaften sowohl der festen als auch derfliissigen Legierungen erklirt.
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