Magnetic heat capacity comparison

Fig. 32 Comparison of zero-field ac susceptibility and magnetic heat capacity versus temperature data for F4BImNN.

Even the nuclear heat capacity of Nd is complicated by the magnetic structure. Anderson et al. (1969) have made an analysis with their best solution given by two unmodulated sub-lattices with electronic moments 2.58 /xb and 1.77 fiB attributed tentatively to the ions on hexagonal and cubic sites, respectively. In reaching this conclusion they made comparison with neutron diffraction results (Moon et al. 1964) which suggest sinusoidally modulated moments with amplitudes 2.3 fj,B and 1.8 /xb, respectively (table 5.2). 

Single-phase samples of actinide tetrafluorides, RF4, R = U, Np, and Pu were synthesized, absorption spectra recorded at 298, 77, and 4K in KBr pellets, the data interpreted, and a comparison of the computed energy levels made with published magnetic properties and heat-capacity measurements (Carnall et al. 1991). Gibson and Haire (1992)Tidentified Amp4 by mass spectrometry. 

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