Superconductivity in Single Crystals of Lu₃T₄Ge_13–x (T = Co, Rh, Os) and Y₃T₄Ge_13–x (T = Ir, Rh, Os)

Abstract

Single crystals of Lu3T4Ge13‐x (T: Co, Rh, Os) and Y3T4Ge13‐x (T: Ir, Rh, Os) are grown by a self‐flux method from mixtures of the elements in ratios of Lu(Y):T:Ge of 2:3:25 or 1:1:20 (1000‐1200 °C; slow cooling to 820‐960 °C) followed by decanting the surplus Ge flux.

Intermediate valence in single crystals of (Lu1−xY bx)3Rh4Ge13 (0 ≤ x ≤ 1)

“…For Lu 3 Rh 4 Ge 13 , the curve in Fig. 4 corresponds to H = 3 T, since this field value was needed to suppress the superconducting temperature to below 0.4 K. 5 The electronic specific heat coefficient γ, estimated at the lowest measured temperature (T = 0.4 K) as γ = C p /T, increases for x ≤ 0.15 and decreases for higher x, following same trend as M(7 T). The maximum γ(0.4 K) = 126 mJ/mol R K 2 for x = 0.15 is likely an underestimate, given the nearly divergent C p /T at the lowest measured temperatures.…”

“…Single crystals of (Lu 1−x Yb x ) 3 Rh 4 Ge 13 (x = 0, 0.05, 0.1, 0.15, 0.2, 0.4, 0.6, 0.8, and 1) were prepared using a self-flux method as described elsewhere. 5 Room temperature powder X-ray diffraction data were collected in a Rigaku D/Max X-ray diffractometer using Cu Kα radiation with wavelength λ = 1.5406 Å. Rietveld analysis was performed using the GSAS software package. 22 DC magnetic susceptibility was measured in a Quantum Design (QD) Magnetic Properties Measurement System (MPMS) with a magnetic field H ∥a.…”

Nodeless superconductivity and the peak effect in the quasiskutterudites Lu3Os4Ge13 and Y3Ru<

“…Since the discovery of the ternary superconducting stannides R 3 T 4 M 13 1,2 , numerous compounds with this stoichiometry have been synthesized, where R is an alkaline earth or rare earth metal, T is a transition metal, and M is one of In, Si, Ge, Sn or Pb. At room temperature, most of these materials crystallize in the primitive cubic Yb 3 Rh 4 Sn 13 type structure with the space group Pm3n 2 .…”

AlPd15B7: a new superconducting cage-compound with an anti-Yb3Rh4Sn13-type of structure

“…[1][2][3][4] They became an object of numerous studies, mostly owing to the interesting interplay between magnetic and superconducting properties. 1,[5][6][7][8][9] The crystal structures of both Remeika M 3 T 4 X 13 phases and filled-skutterudites 10,11 are derivatives of the simple perovskite-type structure, and show similar arrays of cornersharing trigonal prisms/antiprisms (octahedra) enclosing icosahedral voids. For more details about their structural relationships, we refer to ref.…”