A crystallographic phase transition within the magnetically ordered state of Ce_2Fe_17

Abstract

X-ray diffraction experiments were performed on polycrystalline and single-crystal specimens of Ce${}_2$Fe${}_{17}$ at temperatures between 10 K and 300 K. Below $T_{\mathrm{t}}$ = 118$\pm$2 K, additional weak superstructure reflections were observed in the antiferromagnetically ordered state. The superstructure can be described by a doubling of the chemical unit cell along the $\mathbf{c}$ direction in hexagonal notation with the same space group $R\bar{3}m$ as the room-temperature structure. The additional antiferromagnetic satellite reflections observed in earlier neutron diffraction experiments can be conclusively related to the appearance of this superstructure.

8 pages, figures, submitted for publication in Phys. Rev. B

References in corpus (1)

• Magnetic phase diagram of Ce2Fe17

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