Published April 2018 | Version v1
Journal article Metadata-only

Threshold heating temperature for magnetic hyperthermia: Controlling the heat exchange with the blocking temperature of magnetic nanoparticles

Creators

  • 1. Physics Institute, Fluminense Federal University, Av. Gal. Milton Tavares de Souza s/n, 24210-346 Niterói, RJ (Brazil)
  • 2. Faculty of Physics, M.V. Lomonosov Moscow State University, 119991 Moscow (Russian Federation)
  • 3. Advanced Magnetic Technologies and Consulting LLC, 142190 Troitsk (Russian Federation)
  • 4. Blokhin National Medical Center of Oncology&Faculty of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow (Russian Federation)
  • 5. Brazilian Center for Research in Physics, Rua Dr Xavier Sigaud 150, 22290-180 Rio de Janeiro, RJ (Brazil)
  • 6. Physics Department and I3N, University of Aveiro, Aveiro 3810 (Portugal)

Description

Highlights: • Heating mechanism stops at the blocking temperature of La0.75Sr0.25MnO3 nanoparticles. • Hysteresis as an important mechanism of heating. • Properties of this material are advantageous for therapeutic magnetic hyperthermia. - Abstract: La0.75Sr0.25MnO3 nanoparticles with average diameter close to 20.9 nm were synthesized using a sol-gel method. Measurements showed that the heating process stops at the blocking temperaturesignificantly below the Curie temperature. Measurements of Specific Absorption Rate (SAR) as a function of AC magnetic field revealed a superquadratic power law, indicating that, in addition to usual Néel and Brown relaxation, the hysteresis also plays an important role in the mechanism of heating. The ability to control the threshold heating temperature, a low remanent magnetization and a low field needed to achieve the magnetic saturation are the advantages of this material for therapeutic magnetic hyperthermia.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.jssc.2018.01.001

Additional details

Identifiers

DOI
10.1016/j.jssc.2018.01.001;
PII
S002245961830001X;

Publishing Information

Journal Title
Journal of Solid State Chemistry (Print)
Journal Volume
260
Journal Page Range
p. 34-38
ISSN
0022-4596
CODEN
JSSCBI

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
51055949
Subject category
S36: MATERIALS SCIENCE; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
CHANNELING; CURIE POINT; HEATING; HYPERTHERMIA; MAGNETIC FIELDS; MAGNETIZATION; NANOPARTICLES; SOL-GEL PROCESS
Descriptors DEC
BODY TEMPERATURE; PARTICLES; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES; TRANSITION TEMPERATURE

Optional Information

Notes
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