Microscopic theory of the specific absorption rate for self-controlled magnetic hyperthermia

Apostolova, I. N.; Apostolov, A.; Wesselinowa, J. M.

doi:10.1016/j.jmmm.2020.167504

Cited by 5 publications

(2 citation statements)

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“…SAR is a quantitative feature of this transfer. We observe a quadratic SAR dependence on the amplitude of the applied magnetic field in accordance with the analytical expression reported in [ 57 ]:

. All these results show that these NPs are appropriate for application in MHT.…”

Section: Numerical Results and Discussionsupporting

confidence: 90%

Magnetic, Optical and Phonon Properties of Ion-Doped MgO Nanoparticles. Application for Magnetic Hyperthermia

2023

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The influence of size and doping effects on the magnetization M, phonon ω and band gap energy Eg of MgO nanoparticles is studied using a microscopic model. The room-temperature ferromagnetism is due to surface or/and doping effects in MgO nanoparticles (NPs). The influence of the spin–phonon interaction is discussed. M increases with decreasing NP size. M and Eg can increase or decrease by different ion doping (Co, Al, La, Fe) due to the different strain that appears. It changes the lattice parameters and the exchange interaction constants. We found that MgO NP with size of 20 nm and Fe- or Co-doping concentration x = 0.1 and x = 0.2, respectively, have a Curie temperature TC = 315 K, i.e., they are appropriate for application in magnetic hyperthermia, they satisfy the conditions for that. The energy of the phonon mode ω = 448 cm−1 increases with decreasing NP size. It increases with increasing Co and Fe, or decreases with Sr ion doping.

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. All these results show that these NPs are appropriate for application in MHT.…”

Section: Numerical Results and Discussionsupporting

confidence: 90%

Magnetic, Optical and Phonon Properties of Ion-Doped MgO Nanoparticles. Application for Magnetic Hyperthermia

2023

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“…An entirely microscopic model for calculating

SAR

was recently proposed by Apostolova et al, [ 36 ] which makes it possible to study thermal efficiency as a function of the microscopic magnetic characteristics of the system and the energy of elementary excitations and damping.…”

Section: Model and Methodsmentioning

confidence: 99%

Application of Ion‐Doped Y₃Fe₅O₁₂ Nanoparticles for Self‐Controlled Magnetic Hyperthermia

Apostolov

Apostolova

Wesselinowa

2022

Physica Status Solidi (b)

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Herein, doped yttrium garnet (YIG) nanoparticles (NPs) normalY 3 false[ F normale 2 − y M y false] a false( F normale 3 − z M z false) d normalO 12 ( M = Al, Ga, Sc are nonmagnetic ions) are studied, appropriate for self‐controlled magnetic hyperthermia (SCMH) for in vivo and in vitro applications. A microscopic model (modified Heisenberg Hamiltonian) and the Green's function technique are used to investigate the temperature, doping, and size dependence of magnetic phase transition, saturation magnetization, the coercivity, and the specific absorption rate coefficient to fulfill the conditions for magnetic hyperthermia. A set of mixed yttrium garnet magnetic NPs is found, which are suitable for applications in medicine for cancer therapy. There are two Sc‐doped YIG NPs which are the best candidates for SCMH with x = 1.08, d = 27.5 nm, and SAR max = 13.52 W normalg − 1 , as well as x = 1.10, d = 29.7 nm, and SAR max = 15.44 W normalg − 1 for which the conditions for biocompatibility and maximization of SAR are fulfilled simultaneously. Moreover, also Al‐ and Ga‐doped YIG NPs are found that can be applied for magnetic hyperthermia but with smaller SAR effectivity.

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Langevin dynamic simulations of magnetic hyperthermia in rotating fields

Gontijo

Guimarães

2023

Journal of Magnetism and Magnetic Materials

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Microscopic theory of the specific absorption rate for self-controlled magnetic hyperthermia

Cited by 5 publications

References 64 publications

Magnetic, Optical and Phonon Properties of Ion-Doped MgO Nanoparticles. Application for Magnetic Hyperthermia

Magnetic, Optical and Phonon Properties of Ion-Doped MgO Nanoparticles. Application for Magnetic Hyperthermia

Application of Ion‐Doped Y₃Fe₅O₁₂ Nanoparticles for Self‐Controlled Magnetic Hyperthermia

Langevin dynamic simulations of magnetic hyperthermia in rotating fields

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Microscopic theory of the specific absorption rate for self-controlled magnetic hyperthermia

Cited by 5 publications

References 64 publications

Magnetic, Optical and Phonon Properties of Ion-Doped MgO Nanoparticles. Application for Magnetic Hyperthermia

Magnetic, Optical and Phonon Properties of Ion-Doped MgO Nanoparticles. Application for Magnetic Hyperthermia

Application of Ion‐Doped Y3Fe5O12 Nanoparticles for Self‐Controlled Magnetic Hyperthermia

Langevin dynamic simulations of magnetic hyperthermia in rotating fields

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Application of Ion‐Doped Y₃Fe₅O₁₂ Nanoparticles for Self‐Controlled Magnetic Hyperthermia