Values are plotted against their respective magnetic ordering temperatures (Tord), for ΔμoH = 1 T. The filled symbols indicate that the compound contains a rare-earth element and the open symbols indicate that the compound is based solely on transition-metal elements. The numeric labels refer to the compounds listed in Table S6 of the Supplementary Information. Values are estimated or taken from refs. 27 , 29 , 30 , 31 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 . Note that the peak values can be shifted by several Kelvin from Tord.