Electron Spin Resonance in $n$-Type InSb

Experimental data on the $g$ value of conduction electrons in InSb are presented for concentrations over the range 3.6×${10}^{13}$/${\mathrm{cm}}^3$ to 1.5×${10}^{16}$/${\mathrm{cm}}^3$ at 9 and 35 Gc/sec. Agreement with existing theory is fairly good. The experimental effective mass for the electrons at $k=0\mathrm{}$ is $0.0136m_0$. Linewidth-versus-concentration data are included, the narrowest lines (0.3G) occurring at about 5×${10}^{14}$/${\mathrm{cm}}^3$. Also included are estimates placing an upper limit of 5×${10}^{-7\mathrm{}}$ sec on the electron spin-lattice relaxation time $T_{1e}$.