Evaluation of La1−xSrxMnO3 (0 ≤ x < 0.4) synthesised via a modified sol–gel method as mediators for magnetic fluid hyperthermia

K. McBride, J. Cook, S. Gray, S. Felton, L. Stella, D. Poulidi

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Abstract

A range of lanthanum strontium manganates (La1−xSrxMnO3–LSMO) where 0 ≤ x < 0.4 were prepared using a modified peroxide sol–gel synthesis method. The magnetic nanoparticle (MNP) clusters obtained for each of the materials were characterised using scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and infra-red (IR) spectroscopy in order to confirm the crystalline phases, crystallite size and cluster morphology. The magnetic properties of the materials were assessed using the Superconducting quantum interference device (SQUID) to evaluate the magnetic susceptibility, Curie temperature (Tc) and static hysteretic losses. Induction heating experiments also provided an insight into the magnetocaloric effect for each material. The specific absorption rate (SAR) of the materials was evaluated experimentally and via numerical simulations. The magnetic properties and heating data were linked with the crystalline structure to make predictions with respect to the best LSMO composition for mild hyperthermia (41 °C ≤ T ≤ 46 °C). La0.65Sr0.35MnO3, with crystallite diameter of 82.4 nm, (agglomerate size of ∼10 μm), Tc of 89 °C and SAR of 56 W gMn−1 at a concentration 10 mg mL−1 gave the optimal induction heating results (Tmax of 46.7 °C) and was therefore deemed as most suitable for the purposes of mild hyperthermia, vide infra.
Original languageEnglish
Pages (from-to)407-416
Number of pages10
JournalCrystEngComm
Volume18
Issue number3
Early online date07 Dec 2015
DOIs
Publication statusPublished - 2016

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  • Student Theses

    Radio Frequency Heating of Magnetic Perovskite Nanoparticles in Solution for Biomedical Applications

    Author: Cook, J., Jul 2020

    Supervisor: Poulidi, D. (Supervisor) & Stella, L. (Supervisor)

    Student thesis: Doctoral ThesisDoctor of Philosophy

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