Study of magnetic field induced spin order in diluted antiferromagnetic states in a Ga doped α-Fe₂O₃ system prepared by a chemical route and air annealing

Abstract

We report the structural phase characterization and magnetic properties of the chemical routed α-Fe2−xGaxO3 system (x: 0.28–0.60) after annealing at 800 °C in air.

Metamagnetism emergence and spectroscopic elucidation of SmFeO3 nanoceramics

“…On the other hand, the FC cycle maintains magnetization around 75 × 10 −3 emu g −1 at 20 K. These two contradictory features between ZFC and FC cycles create a strong bifurcation and irreversibility, thereby leading to discontinuous first order transition below 225 K. While reducing the temperature below 20 K during both cycles, canted FM interaction between Sm 3+ -O-Sm 3+ creates a quasi-paramagnetic (QPM) ordering. This kind of a low temperature QPM phenomenon is reported in α-Fe 2 O 3 [12]. 2(b(i)) shows a broad hysteresis loop which confirms canted FM around 300 K. The appearance of S-type behavior with hysteresis in M(H) at 250 and 200 K suggests a metamagnetic transition.…”