DHvA effect of R(R=La,Ce)3Pd20Ge6 under uniaxial compression

Abstract We report the first successful dHvA experiment under uniaxial compression in such compound Ce 3 Pd 20 Ge 6 that exhibits quadrupolar ordering and in its reference compound La 3 Pd 20 Ge 6 . The frequency changes with uniaxial pressure are qualitatively similar in the two compounds, but the magnitude of the frequency change in Ce 3 Pd 20 Ge 6 is about twice as much as that in La 3 Pd 20 Ge 6 , implying that the degenerate ground state of the localized f electrons is significantly affected by the uniaxial compression.