Tunable Magnetic Heating in La0.51Sr0.49MnO3 and La0.51Dy0.045Sr0.445MnO3 Nanoparticles: Frequency- and Amplitude-Dependent Behavior

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

doi:10.3390/nano15090642

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Tunable Magnetic Heating in La_0.51Sr_0.49MnO₃ and La_0.51Dy_0.045Sr_0.445MnO₃ Nanoparticles: Frequency- and Amplitude-Dependent Behavior

by

Mourad Smari

^1,*

,

Monica Viorica Moisiuc

²,

Mohammad Y. Al-Haik

³,

Iordana Astefanoaei

²,

Alexandru Stancu

²

,

Fedor Shelkovyi

⁴,

Radel Gimaev

⁵,

Julia Piashova

⁴,

Vladimir Zverev

^4,8

and

Yousef Haik

^6,7,*

¹

Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates

²

Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 700506 Iasi, Romania

³

Department of Sustainable and Renewable Energy Engineering, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates

⁴

Faculty of Physics, M.V. Lomonosov Moscow State University, Leninskie Gori, 119991 Moscow, Russia

⁵

Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000 Ljubljana, Slovenia

⁶

Department of Mechanical and Nuclear Engineering, College of Engineering, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates

⁷

Department of Mechanical Engineering, The University of Jordan, Amman 11942, Jordan

⁸

BIMAI-Lab, Biomedically Informed Artificial Intelligence Laboratory, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates

^*

Authors to whom correspondence should be addressed.

Nanomaterials 2025, 15(9), 642; https://doi.org/10.3390/nano15090642

Submission received: 19 March 2025 / Revised: 22 April 2025 / Accepted: 22 April 2025 / Published: 23 April 2025

(This article belongs to the Section Physical Chemistry at Nanoscale)

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Abstract

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_0.51Sr_0.49MnO₃ (LSMO) and Dy-doped La_0.51Dy_0.045Sr_0.445MnO₃ (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.

Keywords: magnetic hyperthermia; perovskite manganite nanoparticles; specific absorption rate (SAR); ferrofluid viscosity; nanoparticle heating efficiency

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MDPI and ACS Style

Smari, M.; Moisiuc, M.V.; Al-Haik, M.Y.; Astefanoaei, I.; Stancu, A.; Shelkovyi, F.; Gimaev, R.; Piashova, J.; Zverev, V.; Haik, Y. Tunable Magnetic Heating in La_0.51Sr_0.49MnO₃ and La_0.51Dy_0.045Sr_0.445MnO₃ Nanoparticles: Frequency- and Amplitude-Dependent Behavior. Nanomaterials 2025, 15, 642. https://doi.org/10.3390/nano15090642

AMA Style

Smari M, Moisiuc MV, Al-Haik MY, Astefanoaei I, Stancu A, Shelkovyi F, Gimaev R, Piashova J, Zverev V, Haik Y. Tunable Magnetic Heating in La_0.51Sr_0.49MnO₃ and La_0.51Dy_0.045Sr_0.445MnO₃ Nanoparticles: Frequency- and Amplitude-Dependent Behavior. Nanomaterials. 2025; 15(9):642. https://doi.org/10.3390/nano15090642

Chicago/Turabian Style

Smari, Mourad, Monica Viorica Moisiuc, Mohammad Y. Al-Haik, Iordana Astefanoaei, Alexandru Stancu, Fedor Shelkovyi, Radel Gimaev, Julia Piashova, Vladimir Zverev, and Yousef Haik. 2025. "Tunable Magnetic Heating in La_0.51Sr_0.49MnO₃ and La_0.51Dy_0.045Sr_0.445MnO₃ Nanoparticles: Frequency- and Amplitude-Dependent Behavior" Nanomaterials 15, no. 9: 642. https://doi.org/10.3390/nano15090642

APA Style

Smari, M., Moisiuc, M. V., Al-Haik, M. Y., Astefanoaei, I., Stancu, A., Shelkovyi, F., Gimaev, R., Piashova, J., Zverev, V., & Haik, Y. (2025). Tunable Magnetic Heating in La_0.51Sr_0.49MnO₃ and La_0.51Dy_0.045Sr_0.445MnO₃ Nanoparticles: Frequency- and Amplitude-Dependent Behavior. Nanomaterials, 15(9), 642. https://doi.org/10.3390/nano15090642

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Tunable Magnetic Heating in La_0.51Sr_0.49MnO₃ and La_0.51Dy_0.045Sr_0.445MnO₃ Nanoparticles: Frequency- and Amplitude-Dependent Behavior

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