Study of La_1−xSr_xMnO₃ nanoparticles: synthesis, magnetic properties and their hyperthermia applications

In this investigation, we synthesized nano-sized perovskite LSMO and Cu-doped LSMCx materials using the sol–gel method, exhibiting appropriate Curie temperatures and magnetic attributes conducive to the application of self-controlled hyperthermia. Centrifugal separation has been used to reduce particle size distribution and thus analyze magnetic properties dependent on mean particle size. Structural analysis was conducted using X-ray Powder Diffraction. The composition was determined through X-ray Photoelectron Spectroscopy, while topographical features were scrutinized employing Scanning Electron Microscopy. Magnetic properties were evaluated employing a Vibrating Sample Magnetometer, and the magneto-thermal characteristics were delineated using an Alternating Magnetic Field hyperthermia system. Notably, this study marks the pioneering identification of La_1−xSr_xMnO₃ as a viable material candidate for auto-regulated hyperthermia, based on its magnetization range (5–20 emu/g) and Curie temperature span (287–357 K) that are changing with the mean particle size. Through comprehensive analysis, we thoroughly investigated its hyperthermia attributes, thereby contributing significant insights to the existing literature.