Study of structural, Griffiths phase, and magneto-crystalline anisotropy in Pr${}_{0.47}$La${}_{0.20}$K${}_{0.33}$Mn${}_{0.91}$Cu${}_{0.09}$O${}_3$ perovskite manganite

This study examined the structural and magnetic properties of polycrystalline perovskite Pr${}_{0.47}$La${}_{0.20}$K${}_{0.33}$Mn${}_{0.91}$Cu${}_{0.09}$O${}_3$. Through Rietveld refinement of powder X-ray diffraction data, it was determined that the material possesses an orthorhombic structure with space group Pnma. At the Curie temperature (T${}_C$=177.80 K), the magnetization behavior shifted from paramagnetic to ferromagnetic, revealing a Griffiths phase characterized by downward divergence from the Curie-Weiss law. Key parameters such as the Curie temperature T${}_C$, the Griffiths temperature (T${}_G$), and the Griffiths exponent (λ) were determined to be 177.80 K, 287.85 K, and 0.0762, respectively. To analyze the saturation magnetization data at higher magnetic fields using the law of approach to saturation (LAS) model, we can determine the magneto-crystalline anisotropy constant (K${}_1$). The value of (K${}_1$) was estimated to be approximately 1.27 × 10${}^6$ erg/cm${}^3$ = 1.27 × 10${}^5$ J/m${}^3$. These findings suggest that the Pr${}_{0.47}$La${}_{0.20}$K${}_{0.33}$Mn${}_{0.91}$Cu${}_{0.09}$O${}_3$ sample shows promise as a candidate for multifunctional devices.