Visualization of ferromagnetic domains in ErNi2B2C single crystals: Weak ferromagnetism and its coexistence with superconductivity
I. S. Veschunov, L. Ya. Vinnikov, S. L. Bud’ko, P. C. Canfield
DOI 10.1103/PhysRevB.76.174506 · Physical Review B
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Abstract
The magnetic flux structure in the basal plane, (001), of single crystals of superconducting ErNi2B2C was studied by high resolution Bitter decoration at temperatures below Tc (superconducting transition) and/or TN (antiferromagnetic transition). Two sets of domain boundaries, in {110} and {100} planes, were observed. The temperature range in which the {100} domain boundaries were observed coincides with the weak ferromagnetic (WFM) ordering in this material. On the other hand, the {110} twin boundaries—the antiferromagnetic domain boundaries—were observed below TN. For comparison, TbNi2B2C, the related compound with higher magnetic ordering temperatures but no superconductivity, was also studied. The possibility of interpretation of {100} boundaries as Bloch domain walls in the weakly ferromagnetic phase, for T<TWFM<TN (TbNi2B2C) or T<TWFM<TN<Tc (ErNi2B2C), is discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| ErNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10.5 | Pressure not reported | unknown |
| YNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 15.5 | Pressure not reported | unknown |
| LuNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 16.5 | Pressure not reported | unknown |
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