Metamagnetism emergence and spectroscopic elucidation of SmFeO₃ nanoceramics

Abstract

Temperature-and field-dependence of magnetization measurements on SmFeO 3 nanoceramics have been carried out, and a first order type metamagnetic phase transition has been observed below 280 K. The Arrott plot on M(H) measurements confirms the emergence of such a first order transition, this could be argued by the creation of a ferromagnetic cluster between the antiferromagnetic Sm 3+ -O-Fe 3+ and Fe 3+ -O-Fe 3+ chains by Sm 3+ ions around the respective transition. Additionally, a quasi-paramagnetic ordering of Sm 3+ spins is observed below 20 K due to canted moment from Sm 3+ -O-Sm 3+ . Electron paramagnetic resonance and Raman measurements at various temperatures exhibit an analogue to the instantaneous first order metamagnetic transition, confirming the predominance of Sm 3+ -O-Fe 3+ and Fe 3+ -O-Fe 3+ interactions above and below 273 K, respectively. The present study brings an important aspect of the presence of the magnetic property in SmFeO 3 pertaining to active and non-active interaction of Sm-O-Fe at the nanoscale regime.

Structural, Elastic and Electronic Properties of $SmFeO_3$ using Density Functional Theory

“…SFO is a promising candidate for many spintronic device applications for many of its interesting and intriguing properties; such as spontaneous reversal of at cryogenic temperatures below 4 K, fast magnetic switching capabilities with high spin switching temperature of 278.5 K and high spin axis rotation temperature of 480 K [5]. SFO magnetic properties depend on particle size, surface morphology and measurements temperature [6][7][8][9][10]. Its high magnetostriction coefficient along with the anomalous magneto-electric behaviour may open up possibilities for different magnetoelastic devices [11][12][13].…”