Magnetic data were collected on a Quantum Design MPMS3 superconducting quantum interference device (SQUID) magnetometer using doubly recrystallized powdered samples. Samples were prepared in an NMR tube containing a finely ground material, with eicosane as a restraint, which was then flame-sealed under vacuo. The ampules were mounted in plastic straws, held in place with diamagnetic tape. Samples were carefully checked for purity and data reproducibility between several independently prepared batches for each compound examined. Isothermal magnetization measurements were performed in DC scan mode with 40 mm scan length and 6 s scan time for all samples.