Lattice modulation and structural phase transition in the antiferromagnet EUAL4

Susumu Shimomura, Hiroki Murao, Satoshi Tsutsui, Hironori Nakao, Ai Nakamura, Masato Hedo, Takao Nakama, Yoshichika Ōnuki

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


X-ray diffraction measurements on the antiferromagnet EuAl4 using synchrotron radiation have revealed that satellite peaks characterized by an incommensurate wave vector (0, 0, ζ) with ζ ≈ 0.18 appear below 145.1 K, suggesting the formation of a charge density wave. The value of ζ shows an inflection at an antiferromagnetic transition temperature of 15.4 K, and it changes discontinuously at lower antiferromagnetic transition temperatures of 12.2 and 10.0 K. The antiferromagnetic transition at 12.2 K is accompanied by a structural transition from the modulated structure on a tetragonal lattice to that on a lattice with lower symmetry such as an orthorhombic one.

Original languageEnglish
Article number014602
JournalJournal of the Physical Society of Japan
Issue number1
Publication statusPublished - 2019


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