Anomalous compression behavior in a C15 Laves compound CeAl2 under high pressure

Although there have been quite a number of discrepancies in the compression curves of CeAl2, such results come from the lattice compression at non-hydrostatic condition by solidification of pressure transmitting medium. We have carried out the powder X-ray diffraction measurement of CeAl2 under hydr...

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Bibliographic Details
Main Authors: Tateno, Shota, Kishii, Nobuya, Ohashi, Masashi, Miyagawa, Hidenori, Oomi, Gendo, Satoh, Isamu, Miyajima, Nobuyoshi, Yagi, Takehiko
Format: Conference Proceeding
Language:English
Subjects:
Diffraction patterns
Hydrostatic pressure
Phase transitions
Physics
Solidification
Transmission
X ray powder diffraction
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Summary:Although there have been quite a number of discrepancies in the compression curves of CeAl2, such results come from the lattice compression at non-hydrostatic condition by solidification of pressure transmitting medium. We have carried out the powder X-ray diffraction measurement of CeAl2 under hydrostatic pressure with helium gas as pressure-transmitting medium which achieves the best hydrostatic conditions. Although no splitting of the peak is observed in the present diffraction pattern, it is found that a full width at half maximum is enhanced above 20 GPa for several Bragg reflections. Such behaviors suggest the existence of a new pressure-induced structural phase transition which is not observed in the previous reports under non-hydrostatic pressure.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/950/4/042030