Some observations of the temperature dependences of magnetic susceptibility of titanium and titanium-aluminum alloys

摘要: The magnetic susceptibilities (χ) of a series single-phase Ti-Al alloys have been measured in the temperature range 74-400 K. In addition, susceptibility dependences, χparallel(T) and χperpendicular(T), single crystal specimens pure Ti intermetallic compound Ti3Al were correlated with results lattice-parameter (c, a) thermal expansion studies. Ti, both χperpendicular(T) (4.2-400 K) are relatively independent below about 70 K, within which volume coefficient is practically zero; increase linearly above 130 region c expand linearly. For Ti3Al, changes slope (78-400 occurring near 200 K 300 accompanied by distinct rates a. As result these other experiments, several statements could be formulated relating to χ(T), alloys: (i) χ(T) was strongly responsive thermally-induced changes: (ii) for family solid solutions, insensitive solute concentration; (iii) total anisotropic; (iv) susceptibility, only one-third accounted calorimetrically Fermi density-of-states, n(EF), remainder being due chiefly orbital paramagnetism; (v) curvature n(E)]E=EF incapable accounting systems under study. To satisfy experimental observations it suggested that principal mechanism dependence lattice-expansion-induced variation paramagnetism.