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Disentangling local heat contributions in interacting magnetic nanoparticles

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F20%3A10246365" target="_blank" >RIV/61989100:27740/20:10246365 - isvavai.cz</a>

  • Result on the web

    <a href="https://journals.aps.org/prb/abstract/10.1103/PhysRevB.102.214412" target="_blank" >https://journals.aps.org/prb/abstract/10.1103/PhysRevB.102.214412</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1103/PhysRevB.102.214412" target="_blank" >10.1103/PhysRevB.102.214412</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Disentangling local heat contributions in interacting magnetic nanoparticles

  • Original language description

    Recent experiments on magnetic nanoparticle hyperthermia show that the heat dissipated by particles must be considered locally instead of characterizing it as a global quantity. Here we show theoretically that the complex energy transfer between nanoparticles interacting via magnetic dipolar fields can lead to negative local hysteresis loops and does not allow the use of these local hysteresis loops as a temperature measure. Our model shows that interacting nanoparticles release heat not only when the nanoparticle magnetization switches between different energy wells, but also in the intrawell motion, when the effective magnetic field is changed because the magnetization of another particle has switched. The temperature dynamics has a highly nontrivial dependence on the amount of precession, which is controlled by the magnetic damping. Our results constitute a step forward in modeling magnetic nanoparticles for hyperthermia and other heating applications.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    20500 - Materials engineering

Result continuities

  • Project

    <a href="/en/project/LM2018140" target="_blank" >LM2018140: e-Infrastructure CZ</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2020

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Physical review B

  • ISSN

    2469-9950

  • e-ISSN

  • Volume of the periodical

    102

  • Issue of the periodical within the volume

    21

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    6

  • Pages from-to

  • UT code for WoS article

    000597124200003

  • EID of the result in the Scopus database

    2-s2.0-85097583853