Weak Ferromagnetism in InSe:Mn Layered Crystals.

The electron spin resonance, magnetization, and dynamic magnetic susceptibility of In_{1 – x}Mn_xSe layered crystals (x = 0.0125) are studied. It is found that two different impurity subsystems independently coexist in the crystalline layer and in the interlayer spacing of unannealed samples. In both subsystems, ferromagnetic exchange interaction occurs between the Mn ions in the temperature range 300–140 K, and antiferromagnetic interaction occurs in the range 140–77 K. At temperatures below 77 K, a three-dimensional ferromagnetic order emerges. © 2005 Pleiades Publishing, Inc. [ABSTRACT FROM AUTHOR]