20.500.12556/RUL-185644 Tunable magnetic heating in La▫$_{0.51}$▫Sr▫$_{0.49}$▫MnO▫$_{3}$▫ and La▫$_{0.51}$▫Dy▫$_{0.045}$▫Sr▫$_{0.445}$▫MnO▫$_{3}$▫ nanoparticles The use of perovskite manganite nanoparticles in magnetic hyperthermia has attracted significant attention due to their tunable magnetic properties and high specific absorption rate (SAR). In this work, we present a combined experimental and theoretical investigation of the frequency- and amplitude-dependent magnetic heating behavior of La▫$_{0.51}$▫Sr▫$_{0.49}$▫MnO▫$_{3}$▫ (LSMO) and Dy-doped La▫$_{0.51}$▫Dy▫$_{0.045}$▫Sr▫$_{0.445}$▫MnO▫$_{3}$▫ (DLSMO) nanoparticles. The nanoparticles were synthesized via the sol–gel method and characterized by XRD and SEM, while SAR values were experimentally evaluated under varying magnetic field strengths (60–120 Oe) and frequencies (150–300 kHz). In parallel, theoretical modeling based on Néel and Brownian relaxation mechanisms was employed to predict SAR behavior as a function of particle size, magnetic anisotropy, and fluid viscosity. The results reveal that Dy doping enhances magnetic anisotropy, which modifies the relaxation dynamics and leads to a reduction in SAR. The model identifies the optimal nanoparticle size (~18–20 nm) and ferrofluid viscosity to maximize heating efficiency. This combined approach provides a comprehensive framework for designing and optimizing perovskite-based nanoparticles for magnetic hyperthermia applications. magnetic hyperthermia perovskite manganite nanoparticles specific absorption rate (SAR) ferrofluid viscosity nanoparticle heating efficiency magnetna hipertermija perovskitni manganitni nanodelci specifična hitrost absorpcije viskoznost ferofluida učinkovitost segrevanja nanodelcev true false true Angleški jezik Slovenski jezik Članek v reviji 2026-08-14 14:05:19 2026-08-14 14:05:26 2026-08-15 04:01:48 0000-00-00 00:00:00 2025 0 0 15 str. iss. 9, art. 642 Vol. 15 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 537.622:620.3 2079-4991 10.3390/nano15090642 287791107 Smari,_Gimaev...Tunable....pdf Smari,_Gimaev...Tunable....pdf 1 938467A03314CCA4F7199C079E850497 6b1d14585f17ab43b017220241da1128e2a60dd8753808ae14250aa8fe0483b3 5298334e-97d8-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=244384 https://www.mdpi.com/2079-4991/15/9/642 1 14a4c25e-97d8-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=244383 Fakulteta za strojništvo 0 0 0