Fig. 5

Anomalous temperature dependence of SdH oscillation amplitudes. Temperature dependence of the SdH (filled symbols) and dHvA (empty symbols) amplitudes of the fundamental a α-band and b β-band frequencies, for several different samples, where the SdH amplitudes are displayed as Δρ/ρ₀. Samples S1 and S3 were measured in a ³He cryostat in fields up to 15 T, S2 was measured at the High Magnetic Field Laboratory, while S4 and S5 were measured using a Physical Property Measurement System. The field ranges over which the data were analyzed are displayed, while the vertical dashed line marks the position of T_N. The solid lines display fits to the dHvA amplitudes using the temperature damping factor of the Lifshitz-Kosevich formula, with effective masses of 0.26 m_e for the α-band and 0.28 m_e for the β-band