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Temperature and size dependence of magnetic and electron magnetic resonance parameters of Fe nanoparticles embedded in an amorphous SiO2 matrix
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10.1063/1.3537942
/content/aip/journal/jap/109/7/10.1063/1.3537942
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/7/10.1063/1.3537942
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) X-ray diffraction of the Fe/SiO2 nanocomposite with the Miller indices shown for BCC Fe. The insets show TEM images of samples annealed at Ta = 700 °C and Ta = 720 °C with size distribution of the 720 °C sample. The left (right) corner of the inset is 24 × 21 nm2 (408 × 397 nm2).

Image of FIG. 2.
FIG. 2.

(Color online) Room temperature Mössbauer spectra of the two samples annealed at 700 °C and 720 °C.

Image of FIG. 3.
FIG. 3.

Temperature variations of the magnetic susceptibilities of the two samples are shown along with the difference χ(FC) − χ(ZFC shown as solid lines).

Image of FIG. 4.
FIG. 4.

Magnetization vs. magnetic field plots shown for the two samples at 5 K and 300 K with the inset showing the zoom of the low field region.

Image of FIG. 5.
FIG. 5.

(Color online) Detailed magnetization vs. field data shown for the 30 nm sample at temperatures 2, 10, 20, 50, and 325 K with the inset showing temperature dependence of HC, Mr, and MS.

Image of FIG. 6.
FIG. 6.

(a) EMR line profiles for the 30 nm sample at temperatures T = 5, 10, 17, 25, 35, 50, 63, 80, 100, 120, 140, 160, 180, 200, 220, 240, 260, 280, and 300 K are shown; temperature variations of ΔH and resonance field Hr of the 17 nm and 30 nm samples are shown in (b) and (c), respectively.

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/content/aip/journal/jap/109/7/10.1063/1.3537942
2011-03-21
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Temperature and size dependence of magnetic and electron magnetic resonance parameters of Fe nanoparticles embedded in an amorphous SiO2 matrix
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/7/10.1063/1.3537942
10.1063/1.3537942
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