Data for Phys. Rev. B 95, 024402 (2017).

Fig4a.dat
Differential susceptibility vs, applied field from T. Lancaster et al., Phys. Rev. Lett. 112, 207201 (2014).
Columns 1, 3, 5, 7, 9, 11, 13, 15 = Applied magnetic field (Tesla);
Columns 2, 4, 6, 8, 10, 12, 14, 16= dM/dH (arbitrary units).

He bath temperatures:
Columns 1-2: 0.58 K
Columns 3-4: 0.80 K
Columns 5-6: 0.91 K
Columns 7-8: 1.01 K
Columns 9-10: 1.20K
Columns 11-12: 1.31 K
Columns 13-14: 1.49 K
Columns 15-16: 4.20 K

Fig4b.dat
Differential susceptibility vs, applied field.
Columns 1, 3, 5, 7, 9, 11, 13, 15, 17= Applied magnetic field (Tesla;
Columns 2, 4, 6, 8, 10, 12, 14, 16, 18= -dM/dH (arbitrary units).

The figure in the paper is obtained by multiplying Columns 2, 4, 6, 8, 10, 12, 14, 16, 18 by a factor of -1.

He bath temperatures:
Columns 1-2: 0.57 K
Columns 3-4: 0.77 K
Columns 5-6: 1.00 K
Columns 7-8: 1.51 K
Columns 9-10: 1.79 K
Columns 11-12: 2.01 K
Columns 13-14: 2.25 K
Columns 15-16: 2.72 K
Columns 17-18: 3.01 K

Fig4b.dat
Differential susceptibility vs, applied field.
Columns 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 = Applied magnetic field (Tesla);
Columns 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 = dM/dH (arbitrary units).

He bath temperatures:
Columns 1-2: 0.54 K,
Columns 3-4: 0.77 K,
Columns 5-6: 1.08 K,
Columns 7-8: 1.41 K,
Columns 9-10: 1.68 K,
Columns 11-12: 1.82 K,
Columns 13-14: 1.97 K,
Columns 15-16: 2.19 K,
Columns 17-18: 2.77 K,
Columns 19-20: 3.60 K.


Fig6a.dat
Zero-field Heat capacity vs. temperature from T. Lancaster et al., Phys. Rev. Lett. 112, 207201 (2014).
Column 1 = Temperature (K);
Column 2 = Heat capacity (Joules per Kelvin per mole).

The data in Fig6a.dat is obtained by dividing Column 2 by Column 1.

Fig6b.dat
Heat capacity vs. temperature from T. Lancaster et al., Phys. Rev. Lett. 112, 207201 (2014).
Columns 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 = Temperature (Kelvin);
Columns 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 = Heat Capacity (Joules per Kelvin per mole).

Measurements are recorded in a quasistatic applied magnetic field
Columns 1-2: 0.5 T,
Columns 3-4: 1 T,
Columns 5-6: 1.5 T,
Columns 7-8: 2 T,
Columns 9-10: 2.5 T,
Columns 11-12: 3 T,
Columns 13-14: 4 T,
Columns 15-16: 5 T,
Columns 17-18: 5.25 T,
Columns 19-20: 5.5 T,
Columns 21-22: 5.75 T,
Columns 23-24: 6 T,
Columns 25-26: 7 T,
Columns 27-28: 8 T,
Columns 29-30: 9 T,
Columns 31-32: 10 T.

Data in Fig. 6(b) may be obtained by subtracting the modelled lattice contribution to the total heat capacity measurement.

Fig7a.dat
Cernox Temperature vs. applied magnetic field
(data are interpolated to 0.02 T intervals and smoothed with adjacent averaging over a 20 sliding point window)

Columns 1, 3, 5, 7, 9, 11 = Applied magnetic field (Tesla);
Columns 2, 4, 6, 8, 10, 12 = Cernox Temperature (Kelvin).

Fig7b.dat
Cernox Temperature vs. applied magnetic field.
Columns 1, 3, 5, 7, 9, 11 = Applied magnetic field (Tesla);
Columns 2, 4, 6, 8, 10, 12 = Cernox Temperature (Kelvin).

Data in Fig10a may be obtained from the data in Fig7a by:
(i) differentiating the Cernox Temperature with respect to the applied magnetic field;
(ii) dividing by temperature;
(iii) smooth, as above;
(iv) differentiating with respect to the applied magnetic field;
(v) smooth, as above.

Fig10b.dat.
d(Gamma)/dB vs. applied magnetic field for measurements in the long-pulse magnet (pulse profile A from Fig. 1).
Columns 1, 3, 5, 7, 9 = Applied magnetic field (Tesla);
Columns 2, 4, 6, 8, 10 = d(Gamma)/dB (arbitrary units).

Figure may be reproduced by adding a constant offset to Column 2.

Fig10c.dat
d(Gamma)/dB vs. applied magnetic field for measurements in the long-pulse magnet (pulse profile B from Fig. 1).
Columns 1, 3, = Applied magnetic field (Tesla)
Columns 2, 4, 6, 8, 10 = d(Gamma)/dB (arbitrary units)

Fig10b.dat
d(Gamma)/dB vs. applied magnetic field for measurements in the long-pulse magnet (pulse profile C from Fig. 1).
Columns 1= Applied magnetic field (Tesla)
Columns 2 = d(Gamma)/dB (arbitrary units)