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Structural and Magnetic Properties of Pb-substituted CuFe2O4 Nanoparticles | ||
| Progress in Physics of Applied Materials | ||
| دوره 6، شماره 3 - شماره پیاپی 12، دی 2026، صفحه 229-238 اصل مقاله (1.08 M) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.22075/ppam.2026.39461.1178 | ||
| نویسندگان | ||
| Sanaz Rezaei1؛ Ahmad Gholizadeh* 1؛ Muhammad Atif2 | ||
| 1School of Physics, Damghan University, Damghan, Iran | ||
| 2Functional Materials Lab, Department of Physics, Air University, PAF Complex E-9, Islamabad, Pakistan | ||
| تاریخ دریافت: 29 مهر 1404، تاریخ بازنگری: 18 دی 1404، تاریخ پذیرش: 01 بهمن 1404 | ||
| چکیده | ||
| Lead-substituted copper ferrites (Cu1-xPbxFe2O4, x = 0.0–0.30) were synthesized via a sol–gel auto-combustion route to explore the structural and magnetic effects of Pb²⁺ incorporation. X-ray diffraction confirmed a tetragonal spinel phase (I41/amd) for low Pb content, which gradually evolved into a pseudo-cubic structure at higher substitution levels. The lattice parameters increased systematically with Pb doping, indicating lattice expansion and suppression of Jahn–Teller distortion. FTIR spectra revealed a red shift of both tetrahedral and octahedral metal–oxygen stretching modes, consistent with elongation of M–O bonds and partial Pb2+ occupancy of both sites. Magnetic measurements showed soft-ferromagnetic behavior with a notable increase in saturation magnetization (Ms) up to x = 0.25, followed by a decrease at higher Pb levels due to secondary phase formation and lattice strain. The reduction in coercivity (Hc) with Pb content reflects a weakening of magnetocrystalline anisotropy and lattice relaxation. These results highlight the structural flexibility and magnetic tunability of Pb-substituted CuFe2O4, emphasizing the role of large, nonmagnetic cations in controlling spinel ferrite functionality. | ||
| کلیدواژهها | ||
| Spinel Ferrite؛ CuFe2O4؛ Sol–gel auto-combustion route؛ FTIR؛ Magnetic behavior | ||
| مراجع | ||
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