Comparative study on the magnetic properties of Fe-substituted Co 2 Sn 1- x Fe x O 4 spinel oxides and its exchange bias effect.

Herein, we report the Fe-substituted Co 2 Sn 1- x Fe x O 4 (0 ⩽ x ⩽ 0.4) inverse spinel's oxide using the solid-state reaction method. X-ray reveals the single-phase cubic structure with space group Fd3m. With increasing Fe in Co 2 Sn 1- x Fe x O 4 spinel oxide, the transition temperature rise. The ac susceptibility at different frequencies also confirms a spin-glassy state at lower temperatures. The strong exchange bias effect appears in the sample having Fe substitution ( x = 0.2) under the presence of constant temperature ∼10 K. The high-temperature susceptibility of Curie-Wise fitting shows that the system changes from antiferromagnetic exchange ( x < 0.2) to ferromagnetic exchange ( x > 0.2).