Single Crystal Growth and Study of the Ferromagnetic Superconductor RbEuFe4As4

Jin Ke Bao, Kristin Willa, Matthew P. Smylie, Haijie Chen, Ulrich Welp, Duck Young Chung, Mercouri G. Kanatzidis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


RbEuFe4As4 exhibits both superconducting order in the FeAs layers and ferromagnetic order in the Eu layers, providing a good platform to study the interaction and microscopic coexistence of these two traditionally incompatible orders. Growing high-quality RbEuFe4As4 single crystals is essential to investigate these phenomena at a deeper level. Here we report the successful growth of the RbEuFe4As4 single crystals with millimeter-size dimensions using a RbAs flux. The high-quality crystals were characterized via resistivity, magnetization, and heat capacity measurements. Single crystal X-ray diffraction data refinements reveal almost regular FeAs4 tetrahedra (As1-Fe-As1 = 108.60(7)°, As2-Fe-As2 = 109.01(8)°, and As1-Fe-As2 = 109.81(2)°) in RbEuFe4As4, providing structural support for the highest superconducting transition temperature (Tc = 36.8 K) among all known AAeFe4As4 (A = K, Rb, Cs; Ae = Ca, Sr, Eu) compounds. Our flux method using RbAs can also be employed to grow other desired transition metal compounds targeting the same crystal structure.

Original languageEnglish (US)
Pages (from-to)3517-3523
Number of pages7
JournalCrystal Growth and Design
Issue number6
StatePublished - Jun 6 2018

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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