Fig. 4: Thermal conductivity and AC susceptibility of Na2BaCo(PO4)2 for B // c. | Nature Communications

Fig. 4: Thermal conductivity and AC susceptibility of Na2BaCo(PO4)2 for B // c.

From: Possible itinerant excitations and quantum spin state transitions in the effective spin-1/2 triangular-lattice antiferromagnet Na2BaCo(PO4)2

Fig. 4

a Magnetic-field dependence of thermal conductivity at different temperatures. For clarifying, the 151 mK, 252 mK and 380 mK curves are shifted upward by 0.5, 1.0 and 1.5, respectively. At 92 mK, there are four minima indicated by arrows. With increasing temperature, the minima become weaker and disappear above 380 mK. b Temperature dependence of κ in different fields. At low fields of 0.5 and 1 T, there is a clear slope change of κ(T) curves around 310 mK, which has good correspondence to the specific-heat anomaly. c AC magnetic susceptibility at different temperatures. There are three peaks in the low-temperature curves. d Magnetization curves obtained by integrating the AC susceptibility data and renormalized with the 3 T value. The lower dashed line indicates a ~1/3 plateau and the upper dashed line indicates the Van Vleck paramagnetic background.

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