Cyclotron Resonance in Nickel

Abstract

Azbel-Kaner cyclotron resonance was studied at 277 GHz and 1.5 °K in a (100)-plane single-crystal specimen of Ni. Resonances from both the neck and belly of the Cu-like majority-spin $s-p$-band Fermi surface were seen. The neck yielded $\frac{m^{*}}{m_0}=0.35\mathrm{}\pm 0.014$ when $\overrightarrow{\mathrm{H}}$ was along $〈011〉$. Beat structure in the subharmonic resonances suggested that belly orbits on both the majority-and minority-spin $s-p$-band Fermi surfaces were observed for $\overrightarrow{\mathrm{H}}$ within 28° of $〈001〉$. As $\overrightarrow{\mathrm{H}}$ was rotated away from $〈001〉$ the heavier mass increased smoothly from $\frac{m^{*}}{m_0}=5.09\mathrm{} \mathrm{to} 5.9$ while the lighter mass increased from 4.33 to 4.86. Only one of the three pairs of symmetry-related minority-spin $d$-band hole pockets were seen. The pockets having their greatest dimension along $〈001〉$ yielded an effective mass which increased from $\frac{m^{*}}{m_0}=0.75\mathrm{}\pm 0.03$ at $〈001〉$ to $m^{*}{m}_0=1.11\mathrm{}$ when $\overrightarrow{\mathrm{H}}$ was 34° from $〈001〉$.