MAGNETIC-PROPERTIES OF (MN, CR)P AND (MN, FE)P COMPOUNDS

Measurements of magnetization were carried out at temperatures from 4.2 to 200 K on the single crystals of Mn1−xFexP compounds for x≤0.15 and magnetic susceptibilities have been measured on polycrystals of Mn1−1−xFexP and Mn1−xCrxP compound systems. The Mn1−1−xFexP compounds for x <0.12 and Mn1−1−xCrxP compounds for x <0.06 show antiferromagnetism at low temperatures and ferromagnetism at high temperatures and the antiferro-ferromagnetic transition temperature increases with incerasing x for the former system and decreases for the latter system. The Mn1−xFexP compounds for 0.12≤x≤1 and Mn1−1−xCrxP for 0.06≤x≤0.55 have only antiferromagnetism and ferromagnetism, respectively. The magnetization curves for the single crystal compounds were analyzed on the basis of the theory of Hiyamizu and Nagamiya. © 1979, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.