The Atomic Heat of Cerium between 1.5 and 20 K

The specific heat of a specimen of cerium of face-centred cubic structure has been measured between 1.5° and 20°K and anomalous effects, expected as a result of the susceptibility measurements of Lock, have been found. The specific heat shows a marked maximum at 12.5°K, the magnitude of which increases with the number of times the specimen has been cooled. The anomaly is probably due to antiferromagnetism.