Effects of Magnetic Order on the Superconducting Length Scales and Critical Fields in Single Crystal ErNi2B2C

P. L. Gammel; B. P. Barber; A. P. Ramirez; C. M. Varma; D. J. Bishop; P. C. Canfield; V. G. Kogan; M. R. Eskildsen; N. H. Andersen; K. Mortensen; K. Harada

doi:10.1103/PhysRevLett.82.1756

Effects of Magnetic Order on the Superconducting Length Scales and Critical Fields in Single Crystal ErNi2B2C

P. L. Gammel, B. P. Barber, A. P. Ramirez, C. M. Varma, D. J. Bishop, P. C. Canfield, V. G. Kogan, M. R. Eskildsen, N. H. Andersen, K. Mortensen, K. Harada

DOI 10.1103/PhysRevLett.82.1756 · Physical Review Letters

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

The flux line form factor in small angle neutron scattering and transport data determines the superconducting length scales and critical fields in single crystal ErNi2B2C. For H‖c, the coherence length ξ increases and the penetration depth λ decreases when crossing TN=6.0K, the Néel transition. The critical fields show corresponding anomalies near TN. For H⊥c, the fourfold modulation of the upper critical field Hc2 is strongly temperature dependent, changing sign near TN, and can be modeled using the anisotropy of the sublattice magnetization.

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	onset
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