Date of Award

Summer 1958

Degree Type

Thesis - Restricted

Degree Name

Master of Science (MS)



First Advisor

Friedrich, L. W.

Second Advisor

Greene, J. B.


The purpose of this investigation was to determine the saturation magnetic moment of various iron-osmium alloys over the temperature range from 770 Kelvin to 3000 Kelvin. The lower temperature limit was selected since it corresponds to the boiling point of liquid nitrogen and is thus rather conveniently obtained by using liquid nitrogen as the coolant. The upper limit corresponds roughly to room temperature and again offers a suitable endpoint since the system was allowed to warm up to the temperature of its surroundings. A subsequent project will carry the investigation down to 4.2 Kelvin by the use of liquid helium as the coolant. The saturation magnetic moment was determined both, as a function of the temperature and also as a function of the percentage of osmium present in the iron. For this reason five different samples were investigated. The samples which were available consisted of 2, 4.4, 7.4, and 10 atomic percent of osmium in iron. Two separate 10 atomic percent samples were studied. The particular alloy of osmium with iron was of interest because osmium lies directly below iron in the periodic table and has the same number of electrons in its outermost subshell as does iron. Throughout this investigation the method of measurement used was that of Faraday. More will be said concerning this method in the discussion to follow.