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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Bibliographic Details
Published in:IEEE transactions on magnetics 2009-10, Vol.45 (10), p.4275-4278
Main Authors: Lin, Chun-Rong, Siao, Yu-Jhan, Lu, Shin-Zong, Gau, Chie
Format: Article
Language:English
Subjects:
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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Summary: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