Superconducting properties of a single-crystal sphere of ErRh4B4
F. Behroozi, L. N. Hall, G. W. Crabtree, D. G. Hinks
DOI 10.1103/PhysRevB.40.6548 · Physical Review B
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Abstract
We report on the superconducting and magnetic properties of a single-crystal sphere of the primitive tetragonal phase of ErRh4B4. Our data consist of magnetization and susceptibility measurements in fields up to 50 kOe and at temperatures down to 0.4 K. The crystal exhibits extreme anisotropy in its response to a magnetic field. It is a weak paramagnet when the external field is along the tetragonal c¯ axis but reverts to a strong paramagnet when the field is in the basal plane. The magnetization curves reveal a first-order phase transition at Hc2 when the field is in the basal plane. Evidence for a temperature domain in which superconductivity and long-range ferromagnetic order appear to coexist is also presented. The magnetization curves are further analyzed to obtain the critical fields, the Ginzburg-Landau parameters, Curie plot, and the ferromagnetic moment of the system.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| ErRh4B4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.6 | Pressure not reported | unknown |
| ErRh4B4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.5 | Pressure not reported | unknown |
| ErRh4B4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.8 | Pressure not reported | unknown |
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