Nd³⁺-Doped Scheelite-Type Multifunctional Materials-Their Thermal Stability and Magnetic Properties.

Area of Science:

• Materials Science
• Solid State Chemistry
• Inorganic Chemistry

Background:

• Neodymium (Nd³⁺) doping is explored to modify material properties.
• Cadmium molybdato-tungstates are a class of materials with potential applications.
• Understanding the impact of doping on crystal structure and properties is crucial.

Purpose of the Study:

• Synthesize novel Nd³⁺-doped cadmium molybdato-tungstates.
• Investigate the structural, thermal, optical, and magnetic properties of these new materials.
• Determine the effect of Nd³⁺ concentration on lattice parameters and material characteristics.

Main Methods:

• High-temperature solid-state reaction for synthesis.
• X-ray diffraction (XRD) for structural analysis and lattice parameters.
• Scanning electron microscopy (SEM) for surface morphology and grain size.
• Differential thermal analysis coupled with thermogravimetry (DTA-TG) for thermal properties.
• UV-vis-NIR spectroscopy for optical band gap determination.
• Electron paramagnetic resonance (EPR) for magnetic interactions.

Main Results:

• Successful synthesis of Nd³⁺-doped cadmium molybdato-tungstates (Cd_1-3x▯_xNd₂(MoO₄)_1-3(WO₄)₃) with varying Nd³⁺ concentrations.
• XRD analysis revealed changes in lattice parameters with increasing Nd³⁺ ion concentration.
• SEM provided insights into surface morphology and grain size.
• DTA-TG indicated the thermal stability of the synthesized compounds.
• UV-vis-NIR spectroscopy determined the optical band gap.
• EPR spectroscopy elucidated the magnetic interactions between Nd³⁺ ions.

Conclusions:

• The study successfully synthesized and characterized new Nd³⁺-doped cadmium molybdato-tungstates.
• The concentration of Nd³⁺ ions significantly influences the structural and physical properties.
• The comprehensive characterization provides a foundation for understanding these materials and their potential applications.