Anomalous Paramagnetic Effects in the Mixed State of LuNi2B2C
Tuson Park, Y. Sun, M. B. Salamon, A. T. Malinowski, M. F. Hundley,, Eun Mi Choi, Heon Jung Kim, Sung-Ik Lee, P. C. Canfield, V. G. Kogan, and J., D. Thompson
TL;DR
This paper reports unique paramagnetic effects in the mixed state of LuNi2B2C, indicating a bulk transition possibly related to a flux lattice change, which is unprecedented in prior studies.
Contribution
It presents the first observation of anomalous paramagnetic effects in LuNi2B2C's mixed state, linking them to a bulk transition and flux lattice transformation.
Findings
Paramagnetic kink-like features at high fields
Specific heat jump indicating a bulk transition
Evidence of flux lattice change from square to hexagonal
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.
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