High blocking temperature of Fe nanoparticles embedded in diamond thin films | Zendy

Makoto Kawano | Zendy; Kazuyuki Hirama | Zendy; Kazuhide Kumakura | Zendy

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High blocking temperature of Fe nanoparticles embedded in diamond thin films

Author(s) -

Makoto Kawano,

Kazuyuki Hirama,

Kazuhide Kumakura

Publication year - 2022

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/5.0084255

Subject(s) - superparamagnetism , magnetization , materials science , condensed matter physics , ferromagnetism , magnetic anisotropy , diamond , nanoparticle , magnetic nanoparticles , anisotropy , atmospheric temperature range , particle (ecology) , thin film , nanotechnology , magnetic field , composite material , optics , thermodynamics , physics , oceanography , quantum mechanics , geology

We investigate the magnetic properties of Fe nanoparticles (NPs) embedded in diamond (111) thin films. The Fe NPs have body-centered cubic structures with median particle diameters in the range of 9–26 nm. Magnetization measurements revealed that they have large magnetic anisotropy and show a transition from a ferromagnetic to superparamagnetic state at a blocking temperature between 480 and around 1000 K depending on their particle diameters. These magnetic properties are well explained by coherent magnetization rotation models proposed by Stoner–Wohlfarth and Néel.

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