Shivaji College is one of the constituent colleges of the University of Delhi. It is a co-educational institution and imparts instruction in various subjects at both undergraduate and postgraduate levels.
Ce-substituted Fe-rich cobalt ferrite nanoparticles with the general formula Co0.9Fe2.1-xCexO4 (x = 0.0–0.10) were synthesized by a sol–gel auto-combustion route to investigate the interplay between lattice strain, elastic response, and magnetic anisotropy induced by rare-earth doping. X-ray diffraction combined with four independent strain–size models (Williamson–Hall, Size–Strain Plot, Halder–Wagner, and Nelson–Riley) confirmed the formation of a single-phase spinel structure and revealed that Ce incorporation simultaneously increases crystallite size ( 20–30 nm) and microstrain due to defect-mediated lattice distortion. FTIR-derived force constants and elastic moduli indicate progressive bond softening and porosity-driven reduction in effective stiffness with increasing Ce content. Magnetic measurements show a systematic enhancement of coercivity from 2.8 to 3.8 kOe and an increase in magnetocrystalline anisotropy, originating from Ce-induced lattice strain, defect-mediated domain-wall pinning, and modified spin–orbit coupling. In contrast, the saturation magnetization decreases due to dilution of B-site Fe3+ by non-magnetic Ce3+ and the consequent weakening of A–B superexchange interactions, consistent with Néel’s ferrimagnetic model. By correlating multiple strain-analysis models with elastic and magnetic parameters, this work establishes a unified structure–mechanics–magnetism framework for Ce-doped cobalt ferrites, which has not been previously reported. The combination of enhanced coercivity, tunable anisotropy, and defect-engineered elastic response highlights the potential of these materials for high-frequency magnetic devices, spintronic components, and multifunctional oxide-based applications.
During the monsoon months of June to September 2025, mushroom samples were collected from locations including Himayat Bagh, Daulatabad, and the Dr. Babasaheb Ambedkar Marathwada University campus in the Chhatrapati Sambhajinagar District of Maharashtra, India. Through comprehensive taxonomic analysis, these samples were classified as Pleurotus ostreatus (Berk.) Sacc., Sacc., Chlorophyllum molybdites (G. Mey.) Massee, and Lepista ovispora (J.E. Lange) Gulden. The identification process relied on both macroscopic and microscopic features. This taxonomic study offers essential baseline data regarding the diversity of wild agaric mushrooms in the Marathwada region.
It is proved that there is a one to one correspondence between representations of C*-ternary ring M and C*-algebra A(M). We discuss primitive and modular ideals of a C*-ternary ring and prove that a closed ideal I is primitive or modular if and only if so is the ideal A(I) of A(M). We also show that a closed ideal in M is primitive if and only if it is the kernel of some irreducible representation of M. Lastly, we obtain approximate identity characterization of strongly quasi-central C*- ternary ring and the ideal structure of the TRO V & OTIMES;tminB for a C*-algebra B.
A highly efficient ionic liquid catalyzed protocol has been investigated for the synthesis of 5-(4-substituted-phenyl)-1,3,4-thiadiazole-2-amine derivatives from the cyclocondensation of diversely substituted aromatic carboxylic acid and thiosemicarbazide by using recyclable N-methylpyridiniumtosylate as an ionic liquid. Highly efficient, inexpensive, solvent and metal free, high step and atom efficiency and excellent yield (95%–98%) are remarkable features of present protocol.
In this paper investigation of mixed convective flow and heat transfer in vertical channel filled with immiscible viscous fluids has been carried out. The governing differential equations are solved analytically by regular perturbation method. The impact of governing parameters on velocity and temperature fields namely Grashof number, Brinkman number, perturbation parameter, viscosity ratio, width ratio, conductivity ratio, Nusselt number are investigated and represented graphically.
