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Download fileSingle Crystal Growth and Study of the Ferromagnetic Superconductor RbEuFe4As4
journal contribution
posted on 2018-04-20, 00:00 authored by Jin-Ke Bao, Kristin Willa, Matthew P. Smylie, Haijie Chen, Ulrich Welp, Duck Young Chung, Mercouri G. KanatzidisRbEuFe4As4 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.