Incommensurate antiferromagnetism in the intermetallic superconductor HoNi2B2C

We report high-resolution x-ray and neutron-scattering studies of the antiferromagnetism of the rare-earth superconductor, HoNi2B2C (T-C=8.5 K). At low temperatures, T<5 K, the superconductivity coexists with a long-range ordered, commensurate Neel state. In the incommensurate antiferromagnetic state, 5 K5 K, are interpreted in terms of local strains.This article is published as Hill, J. P., B. J. Sternlieb, D. Gibbs, C. Detlefs, A. I. Goldman, C. Stassis, P. C. Canfield, and B. K. Cho. "Incommensurate antiferromagnetism in the intermetallic superconductor HoNi 2 B 2 C." Physical Review B 53, no. 6 (1996): 3487. DOI: 10.1103/PhysRevB.53.3487. Copyright 1996 American Physical Society. Posted with permission

Muon spin relaxation in the heavy fermion system UPt3

We report muon spin rotation/relaxation (μSR) measurements of the heavy fermion superconductor UPt3 in external fields H ext∥ĉ. We find that the muon Knight shift is unchanged in the superconducting state, consistent with odd-parity pairing (such as p wave). The transverse field relaxation is observed to be strongly field dependent, decreasing with increasing field. Below Tc the increase is barely detectable in an applied field of 4 kG∥ĉ. On the basis of the high field measurements, we estimate the low temperature penetration depth to be λ(T→0)≥ (R18)11 000 Å

Positive muon Knight shift and spin relaxation in heavy fermion superconductors UPt3 and UBe13

We report muon spin rotation/relaxation (μSR) measurements of the heavy fermion superconductors UBe13 and UPt3. In both materials we find that the muon Knight shift is unchanged in the superconducting state, consistent with odd-parity pairing (such as p-wave). The magnetic field penetration depths in UPt3 and UBe13 are extremely long, greater than 10000 Å. We find no evidence of a magnetic transition in UBe13 below 10 K. © 1991