Anomalous Paramagnetic Effects in the Mixed State of LuNi2B2C

Abstract

Anomalous paramagnetic effects in dc magnetization were observed in the mixed state of LuNi2B2C, unlike any reported previously. It appears as a kink-like feature for H > 30 kOe and becomes more prominent with increasing field. A specific heat jump at the corresponding temperature suggests that the anomaly is due to a true bulk transition. A magnetic flux transition from a square to an hexagonal lattice is consistent with the anomaly.

5 pages, 4 figures

References in corpus (8)

• Direct evidence for an intrinsic square vortex lattice in the overdoped high-Tc superconductor La1.83Sr0.17CuO4+d
• Generalized London free energy for high-$T_c$ vortex lattices
• Peak effect in twinned superconductors
• Reentrant vortex lattice transformation in four-fold symmetric superconductors
• Temperature Dependence of the Flux Line Lattice Transition into Square Symmetry in Superconducting LuNi${}_2$B${}_2$C
• Evidence for the Coexistence of Anisotropic Superconducting Gap and Nonlocal Effects in the Non-magnetic Superconductor LuNi2B2C
• Effect of fluctuations on vortex lattice structural transitions in superconductors
• Vortex Lattice Structural Transitions: a Ginzburg-Landau Model Approach

Cited by in corpus (1)

• Observation of a first-order phase transition deep within the vortex-solid region of YBa2Cu3O7