Magnetic Properties of Iron Selenide Nanocrystals Synthesized by the Thermal Decomposition

Magnetic Properties of Iron Selenide Nanocrystals Synthesized by the Thermal Decomposition

Iron selenide nanocrystals with hexagonal (H) and monoclinic (M) NiAs-like structure were synthesized via a one-pot thermal decomposition of ferrous chloride and Se powder in oleylamine. Magnetic measurements indicate that the Curie temperature of the synthesized hexagonal phase and monoclinic phase...

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Veröffentlicht in:IEEE transactions on magnetics 2009-10, Vol.45 (10), p.4275-4278
Hauptverfasser: Lin, Chun-Rong, Siao, Yu-Jhan, Lu, Shin-Zong, Gau, Chie
Format: Artikel
Sprache:eng
Schlagworte:
Argon
Chlorides
Coercivity
Curie temperature
Ferrimagnetic materials
Iron
Magnetic properties
Magnetic variables measurement
Magnetism
Magnetization
Nanocrystals
Powders
Selenides
spin-rotation
Temperature
Thermal decomposition
Thermal engineering
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Zusammenfassung:Iron selenide nanocrystals with hexagonal (H) and monoclinic (M) NiAs-like structure were synthesized via a one-pot thermal decomposition of ferrous chloride and Se powder in oleylamine. Magnetic measurements indicate that the Curie temperature of the synthesized hexagonal phase and monoclinic phase is 453 K and 340 K, respectively. The obtained magnetization sigma 1.1 tau (300 K) for H-phase and M-phase are respectively 9.6 and 6.9 emu/g. Moreover, for the H-phase nanocrystals the spin-rotation process occurs abruptly at about 130 K, while the process does not take place in the case of M-phase.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2009.2025256