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

Smari, Mourad (avtor), Moisiuc, Monica Viorica (avtor), Al-Haik, Mohammad Y. (avtor), Astefanoaei, Iordana (avtor), Stancu, Alexandru (avtor), Shelkovyi, Fedor (avtor), Gimaev, Radel (avtor), Piashova, Julia (avtor), Zverev, Vladimir I. (avtor), Haik, Yousef (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: magnetic hyperthermia, perovskite manganite nanoparticles, specific absorption rate (SAR), ferrofluid viscosity, nanoparticle heating efficiency
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: 15 str.
• Številčenje: Vol. 15, iss. 9, art. 642
• PID: 20.500.12556/RUL-185644
• UDK: 537.622:620.3
• ISSN pri članku: 2079-4991
• DOI: 10.3390/nano15090642
• COBISS.SI-ID: 287791107
• Datum objave v RUL: 14.08.2026

Gradivo je del revije

• Naslov: Nanomaterials
• Skrajšan naslov: Nanomaterials
• Založnik: MDPI AG
• ISSN: 2079-4991
• COBISS.SI-ID: 523286297

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: magnetna hipertermija, perovskitni manganitni nanodelci, specifična hitrost absorpcije, viskoznost ferofluida, učinkovitost segrevanja nanodelcev

Projekti

• Financer: Drugi - Drug financer ali več financerjev
• Številka projekta: 23021440147
• Naslov: University of Sharjah’s competitive grant

• Financer: Drugi - Drug financer ali več financerjev
• Številka projekta: 24021440166
• Naslov: University of Sharjah’s competitive grant