157.    BATES, L. F.  Curie Points.  Proc. Phys. Soc. (London), vol. 43, 1931, I, pp. 87-95; Chem. Abs., vol. 25, 1931, p. 1715.

                  Description of the magnetic behavior of a ferromagnetic substance may require 3 temperatures, (1) the ferromagnetic critical point, at which the rate of change of the square of the intrinsic magnetic moment per unit volume with temperature is a maximum; (2) the ferromagnetic Curie point, at which the intrinsic magnetization may be considered zero; and 93) the paramagnetic Curie point, given by θ in the Curie-Weiss law x=C/(T- θ).  The significance of the ferromagnetic and paramagnetic Curie points is discussed in the light of the results of a number of investigators on Fe, Ni, Co, the ferrocobalts, magnetite, and manganese arsenide.  The paramagnetic behavior of these substances can be accounted for by a slight extension of the idea that ferromagnetism is due to a magnetic particle consisting of a group of associated atoms.

                 BATUEV, M. I.  See abs. 802, 802a, 802b.

                 BATZ, W.  See abs. 3649.