Electrical Resistivity Anomalies in Some High  Crystalline TitaniumAluminum and Vanadium  Alloys.
Abstract
The electrical resistivity (rho) and magnetoresistivity (DELTA)(rho)(H)/(rho) have been measured at 0 (LESSTHEQ) H (LESSTHEQ) 125 kG and 1.2 (LESSTHEQ) T (LESSTHEQ) 4.2 K for the random solidsolution transitionmetalbase alloys Ti(,100x) Al(,x) with 0 (LESSTHEQ) x (LESSTHEQ) 25.3 at .%; V(,100x) Al(,x) with 0 (LESSTHEQ) x (LESSTHEQ) 22.9 at .%; and (Ti(,70) V(,30.))(,100x) Al(,x) with x = 0, 10, and 15 at .%. The normalstate electrical resistivities of the specimens range between 3 and 200 (mu)(OMEGA) cm. At liquidhelium temperatures T of 14 K and in applied magnetic fields H up to 125 kilogauss we observe (a) anomalous negative temperature coefficients of electrical resistivity dln(rho)/dT, and (b) anomalous negative magnetic coefficients of electrical resistivity dln(rho)/dH. Both these coefficients become more negative with increase of (rho) in the range (rho) = 30  200 (mu)(OMEGA) cm. These lowtemperature thermal and magnetic "Mooij correlations" are shown to be roughly consistent with Kawabata's weaklocalization theory for bulk alloys. Analysis of the data for TiAl and TiVAl alloys within the Kawabata theory framework suggests inelastic scattering times (tau)(,i) (PROPORTIONAL) T('1) with (tau)(,i)(1.2K) (DBLTURN) 5 x 10('12) sec for the higher resistivity alloys.
 Publication:

Ph.D. Thesis
 Pub Date:
 1983
 Bibcode:
 1983PhDT........64A
 Keywords:

 Physics: Condensed Matter