Volume 255, Issue 6 1700587
Original Paper

La1−xSrxMnO3 Nanoparticles for Magnetic Hyperthermia

Angel T. Apostolov

Corresponding Author

Angel T. Apostolov

Faculty of Hydrotechnics, Department of Physics, University of Architecture, Civil Engineering and Geodesy, Hr. Smirnenski Blvd. 1, 1046 Sofia, Bulgaria

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Iliana N. Apostolova

Iliana N. Apostolova

Faculty of Forest Industry, University of Forestry, Kl. Ohridsky Blvd. 10, 1756 Sofia, Bulgaria

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Julia M. Wesselinowa

Julia M. Wesselinowa

Department of Physics, University of Sofia, J. Bouchier Blvd. 5, 1164 Sofia, Bulgaria

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First published: 31 January 2018
Citations: 10

Abstract

Using a modified Heisenberg model and a Green's function technique we have studied the influence of size d and concentration x of Sr dopants on the Curie temperature TC, saturation magnetization MS, coercivity HC and specific absorption rate (SAR) of single-domain La1−xSrxMnO3 nanoparticles. Their magnetic properties are explained based on the “magnetically death” surface layer and the competition between the ferromagnetic double-exchange and antiferromagnetic super-exchange interaction. We calculated the specific absorption rate which characterizes the efficiency of the absorption energy when the magnetic hyperthermia is applied as a therapeutic method for the treatment of tumors. A set of nanoparticles appropriate for in vivo and in vitro medical applications, such as magnetic hyperthermia and drug delivery to cancer cells, is determined. The established methodology and microscopic model are suitable to study the magnetic properties of low-dimensional systems (thin films and nanoparticles) such as La1−xAxMnO3 with A = Ca, Ag, Ba, Na for medical applications.

Conflict of Interest

The authors declare no conflict of interest.

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