Magnetic Phase Diagram of Solid Solutions in the CoCr2S4–Cu0.5Ga0.5Cr2S4 System

Resumo

The magnetic phase diagram of solid solutions in the CoCr₂S₄–Cu_0.5Ga_0.5Cr₂S₄ system was constructed. The widest concentration range (0.38 < x < 1) in the diagram represents solid solutions based on the ferrimagnetic semiconductor CoCr₂S₄ (T_C = 223 K), which exhibits unusual properties in the magnetic ordering region while measuring the temperature dependence of the dynamic susceptibility. The magnetic properties were studied with a Quantum Design PPMS-9 platform within the temperature range 5–300 K in a 100-Oe constant magnetic field and/or a varying (100-, 500-, and 1000-Hz) magnetic field with an amplitude of 1 Oe.