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Specific Heat of Ca0.33Na0.67Fe2As2

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arxiv 1406.7519 v1 pith:7USY6ZDP submitted 2014-06-29 cond-mat.supr-con

Specific Heat of Ca0.33Na0.67Fe2As2

J. S. Kim , K. Zhao , C. Q. Jin , G. R. Stewart This is my paper
classification cond-mat.supr-con
keywords deltacfe2as2heatspecifichole-dopedmeasuredabovecanfield
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The specific heat of single crystal hole-doped Ca0.33Na0.67Fe2As2, Tc(onset)=33.7 K, was measured from 0.4 to 40 K. The discontinuity in the specific heat at Tc, deltaC, divided by Tc is 105 +- 5 mJ/molK2, consistent with values found previously for hole-doped Ba0.6K0.4Fe2As2 and somewhat above the general trend for deltaC/Tc vs Tc for the iron based superconductors established by Bud'ko, Ni and Canfield. The usefulness of measured valued of deltaC/Tc as an important metric for the quality of samples is discussed.

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