MAGNETIC PROPERTIES OF A SERIES OF NICKEL-COPPER-IRON ALLOYS

摘要

Investigation of the magnetic properties of a series of Ki-Cu-Fe alloys was motivated by the need for telemetry of human body temperature. Ki-Cu-Fe alloys were prepared by levitation melting of compressed chips of the pure metals. Over one hundred alloys were prepared in this manner and measurement of the individual Curie temperatures provided additional information for the Ki-Cu-Fe ternary. The area of the Ki-Cu-Fe ternary investigated was within the limits, 47-53% Copper, 40-48%nickel, and 4-8% Iron. The Curie temperatures measured within this area varied from -67.6*C to +157.5*C, Measurement of the initial permeability of the Hi-Cu-Fe alloys was limited but it was found that magnetic saturation of the Hi-Cu-Fe alloy occurred at unusually low values of magnetic field intensity. The feasibility of the Ki-Cu-Fe alloy as an active element for telemetry of human body temperature was established.