Magnetocaloric effect and magnetic properties of terbium—gadolinium alloys

Measurements of the magnetocaloric effect and degree of magnetization are performed using samples of the system of rare-earth terbium-hadolinium alloys in fields up to 15 kOe in strength in the temperature range 77-350°K. The Curie temperatures of the alloys are determined. In the alloy Tb$_{0,94}$ Gd$_{0,06}$ antiferromagnetic order domains are found. A spin reorientation type of phase transition is observed in a magnetic field applied along the hard magnetization axis in the Curie temperature domain. The experimental results lead us to suppose that the polar diagram of anisotropy energy at low temperatures has additional extrema in alloys containing considerable amounts of gadolinium.