Magnetic hyperfine field variation with temperature

Fig. 2. Qualitative variation of the nuclear magnetic resonance frequency with the strength of an applied external field for a spherical ferromagnetic sample with negligible magnetic anisotropy and isotropic, positive hyperfine field at low temperature (saturated magnetization).

Figure 4. Temperature variation of the a, /3t, and P-2 fluorine hyperfine splittings of the 300°K radical with the magnetic field parallel to a, b, and c. The spectra become too complex to analyze where the curves are shown dashed. From Reference 12.

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