scholarly journals Controlling the dominant magnetic relaxation mechanisms for magnetic hyperthermia in bimagnetic core–shell nanoparticles

Nanoscale ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 3164-3172 ◽  
Author(s):  
Fernando Fabris ◽  
Enio Lima ◽  
Emilio De Biasi ◽  
Horacio E. Troiani ◽  
Marcelo Vásquez Mansilla ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetic Relaxation ◽  
Magnetic Hyperthermia ◽  
Relaxation Mechanism ◽  
Magnetic Saturation ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Effective Magnetic Anisotropy ◽  
Size And Morphology ◽  
Core Shell Nanoparticles

The dominant magnetic relaxation mechanism can be controlled by changing the effective magnetic anisotropy in core/shell nanoparticles, preserving its magnetic saturation, size and morphology for hyperthermia experiments.

ZnxMn1–XFe2O4@SiO2:zNd3+ Core–Shell Nanoparticles for Low-Field Magnetic Hyperthermia and Enhanced Photothermal Therapy with the Potential for Nanothermometry

2021 ◽  
Vol 4 (2) ◽  
pp. 2190-2210
Author(s):  
Marcus Vinícius-Araújo ◽  
Navadeep Shrivastava ◽  
Ailton A. Sousa-Junior ◽  
Sebastiao A. Mendanha ◽  
Ricardo Costa De Santana ◽  
...  
Keyword(s):  
Photothermal Therapy ◽  
Magnetic Hyperthermia ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Low Field ◽  
Core Shell Nanoparticles

scholarly journals Strongly Exchange Coupled Core|Shell Nanoparticles with High Magnetic Anisotropy: A Strategy toward Rare-Earth-Free Permanent Magnets

2016 ◽  
Vol 28 (12) ◽  
pp. 4214-4222 ◽  
Author(s):  
E. Lottini ◽  
A. López-Ortega ◽  
G. Bertoni ◽  
S. Turner ◽  
M. Meledina ◽  
...  
Keyword(s):  
Rare Earth ◽  
Magnetic Anisotropy ◽  
Permanent Magnets ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Synthesis and Magnetic Properties of FePt Nanoparticles with Hard Nonmagnetic Shells

2007 ◽  
Vol 7 (1) ◽  
pp. 350-355 ◽  
Author(s):  
Shishou Kang ◽  
Shifan Shi ◽  
G. X. Miao ◽  
Zhiyong Jia ◽  
David E. Nikles ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Crystallographic Orientation ◽  
Sol Gel ◽  
Molar Ratio ◽  
Core Shell ◽  
Fept Nanoparticles ◽  
Shell Nanoparticles ◽  
Spherical Core ◽  
Size And Morphology ◽  
Core Shell Nanoparticles

Chemically synthesized FePt nanoparticles were coated with nonmagnetic SiO2 and MnO shells by sol–gel and polyol processes. TEM images show that the FePt/SiO2 nanoparticles exhibit a thick spherical shell. The size and morphology of the MnO shell can be controlled by changing the reaction temperature, the molar ratio of surfactants/Mn(acac)2, and/or the concentration of precursor. The morphology of the MnO shell can be either spherical-like or cubic-like, depending on whether the molar ratio of surfactants/Mn(acac)2 is less than or larger than 2. From XRD measurements, the spherical core/shell nanoparticles exhibit 3D random crystallographic orientation, while the cubic core/shell nanoparticles prefer (200) texture. The magnetic moment of FePt particles can be enhanced by coating with SiO2 and MnO shells. Furthermore, the agglomeration of FePt particles upon the thermal annealing can be significantly inhibited with SiO2 and MnO shells.

Magnetic hyperthermia in brick-like Ag@Fe3O4 core–shell nanoparticles

2016 ◽  
Vol 397 ◽  
pp. 20-27 ◽  
Author(s):  
M.E.F. Brollo ◽  
J.M. Orozco-Henao ◽  
R. López-Ruiz ◽  
D. Muraca ◽  
C.S.B. Dias ◽  
...  
Keyword(s):  
Magnetic Hyperthermia ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles ◽  
Fe3o4 Core

Effect of Magnetic and Geometric Properties on the Time of Magnetic Relaxation of Superparamagnetic Core-Shell Nanoparticles

2013 ◽  
Vol 821-822 ◽  
pp. 1336-1340
Author(s):  
Leonid L. Afremov ◽  
Ilia Ilyushin
Keyword(s):  
Relaxation Time ◽  
Magnetic Relaxation ◽  
Superparamagnetic Nanoparticles ◽  
Exchange Constant ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Interphase Interaction ◽  
Geometric Properties ◽  
Core Shell Nanoparticles ◽  
Magnetic States

Within the frame of two-phase superparamagnetic nanoparticles the effect of magnetic and geometric properties of superparamagnetic nanoparicles on the time of their magnetic relaxation has been defined. With increasing of volume, elongation of nanoparticle and relative volume of inclusions the time of relaxation grows rapidly. Metastability conditions of magnetic states have been developed. Growth of exchange constant magnitude of interphase interaction results in increasing of relaxation time regardless of exchange constant sign. Keywords: superparamagnetic particles, core-shell nanoparticles, relaxation time, magnetic states, critical field, metastable magnetic states, interphase exchange interaction.

scholarly journals Adjusting the Néel relaxation time of Fe3O4/Zn x Co1−x Fe2O4 core/shell nanoparticles for optimal heat generation in magnetic hyperthermia

2020 ◽  
Vol 32 (6) ◽  
pp. 065703
Author(s):  
Fernando Fabris ◽  
Javier Lohr ◽  
Enio Lima ◽  
Adriele Aparecida de Almeida ◽  
Horacio E Troiani ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Heat Generation ◽  
Magnetic Hyperthermia ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Optimal Heat ◽  
Core Shell Nanoparticles ◽  
Néel Relaxation

Increase in the Curie temperature and magnetic anisotropy in FePd/Pt–iron oxide core-shell nanoparticles

2009 ◽  
Vol 106 (7) ◽  
pp. 073903 ◽  
Author(s):  
R. Fleurier ◽  
S. Bhattacharyya ◽  
M.-L. Saboungi ◽  
N. Raimboux ◽  
P. Simon ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Curie Temperature ◽  
Magnetic Anisotropy ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Iron Oxide Core ◽  
Core Shell Nanoparticles
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