Figure 3: Effects of annealing temperature under Ar atmosphere on magnetic properties of Teflon tape.
From: Room temperature ferromagnetism in Teflon due to carbon dangling bonds
(a) Saturation magnetization Ms as a function of annealing temperature of the Teflon tape annealed in pure Ar for 2 h (dashed blue line is a guide for the eyes). Each Ms value was obtained from averaging of six samples. (b,c) ESR results (absorption intensity and derivative) of the two samples annealed at 50 (red) and 150 °C (blue), respectively. (d) ESR spectra taken at different temperatures (300 K (red), 180 K (blue) and 80 K (green)) for the ferromagnetic Teflon (after annealing at 150 °C). The inset shows the integrated intensity of the paramagnetic component as a function of temperature. (e) The normalized remanent magnetization as a function of temperature, and fittings to various models. Mr(0)=0.67 memu g−1. These error bars were obtained based on three measurements.
