Nuclear-Spin-Lattice Relaxation ofV51andTc99in V-Tc Alloys

The spin-lattice relaxation time, $T_1$, associated with the ${\mathrm{V}}^{51}$ and ${\mathrm{Tc}}^{99}$ nuclei in the V-Tc binary alloy system has been measured over a range of compositions at room, liquid-nitrogen, and liquid-helium temperatures. The quantity $T_{1}T$ ($T=\mathrm{absolute}\mathrm{temperature}$) is strongly composition-dependent, but only slightly temperature-dependent, indicating that the predominant relaxation path is via conduction electrons. Of the possible terms contributing to conduction-electron relaxation, that due to the orbital motion of the $d$-band electrons is believed predominant.