Investigation of variable temperature M\"ossbauer spectrum of YFe$_{0.5}$Cr$_{0.5}$O$_3$ perovskite

TL;DR

This study synthesized YFe$_{0.5}$Cr$_{0.5}$O$_3$ perovskite via sol-gel, analyzed its structure and temperature-dependent M"ossbauer spectra, revealing magnetic phase transitions and superparamagnetic behavior.

Contribution

It provides detailed structural and magnetic characterization of YFe$_{0.5}$Cr$_{0.5}$O$_3$ using M"ossbauer spectroscopy at various temperatures, highlighting magnetic phase transition details.

Findings

Orthorhombic structure with Pnma space group

Coexistence of doublet and sextets at 250K indicating superparamagnetism

Magnetic phase transition observed between 250K and 300K

Abstract

In this paper, we reported the preparation of YFe$_{0.5}$Cr$_{0.5}$O$_3$ by the sol-gel method and studied its structure and M\"ossbauer spectrum at variable temperatures. X-ray diffraction(XRD) analysis exhibits that the sample has the orthorhombic structure with the Pnma space group, and the energy dispersive spectroscopy (EDS) analysis shows that the sample has Fe/Cr = 1:1, indicating that the sample is Fe half-doped YCrO$_3$. The hyperfine parameters of the M\"ossbauer spectrum at room temperature confirm that the characteristics of 57Fe in the sample were trivalent hexacoordinated high-spin(s=5/2), and the coexistence of doublet and the sextets at 250K indicate that the sample has superparamagnetic relaxation. The M\"ossbauer spectrum records the magnetic phase transition in the temperature range of 250K-300K.