Field-induced low-temperature anomaly in kappa-(D-8-BEDT-TTF)(2)Cu (NCS)(2)

The linear coefficient of thermal-expansion, alpha(T), on a high-quality si ngle crystal of the title compound reveals pronounced and strongly anisotro pic phase-transition anomalies at T-c = 9.95 K, Application of magnetic fie lds perpendicular to the conducting planes leads to pronounced superconduct ing fluctuation effects and scaling behaviour in alpha(T,B). The latter ena bles us to separate an additional, field-induced anomaly in the superconduc ting state for B greater than or equal to 3 T. Anomalous behaviour remains also in fields B > B-c2 with a qualitative different phenomenology.