Magnetism and superconductivity in M5Rh4Ge10 (M=Gd, Tb, Dy, Ho, Er, Tm, Lu, and Y)
N. G. Patil, S. Ramakrishnan
DOI 10.1103/PhysRevB.59.9581 · Physical Review B
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Abstract
Low-temperature resistivity, magnetization and heat-capacity studies are reported for the isostructural M5Rh4Ge10 (M=Gd,Tb,Dy,Ho,Er,Tm,Lu, and Y) series. Some of the compounds (M=Gd,Tb,Er, and Tm) show multiple magnetic transitions below 15 K while others (M=Dy and Ho) exhibit only a single magnetic transition. The four magnetic transitions observed for Gd5Rh4Ge10 and Tb5Rh4Ge10 are unusual in that the one at the highest temperature is a second-order phase transition while the other three are first-order transitions probably involving moment reorientations. An anisotropic exchange interaction is proposed as the cause of the multiple transitions. Of the nonmagnetic compounds, Lu5Rh4Ge10 shows superconductivity below 2.4 K whereas Y5Rh4Ge10 remains normal down to 1.7 K. The results are compared with those of the previously investigated M5Ir4Si10 series.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Lu5Rh4Ge10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.4 | Pressure not reported | onset |
| Lu5Rh4Ge10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.4 | Pressure not reported | midpoint |
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