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H c2 of MgCNi3 Determined from the Specific Heat and Resistivity Measurements

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Abstract

H c2 of MgCNi3 has been determined from the specific heat C and resistivity ρ measurements in the same sample. The results from ρ are nearly identical with those determined from the anomaly in C. Furthermore, utilizing the relation γ(H) ∝ H and the value of dγ/dH, the obtained value of H c2 is the same as that by the WHH model, if the spin paramagnetic effect and the spin–orbit interaction are taken into account. The results of this comparison have strong implications on the order parameter of MgCNi3.

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Authors and Affiliations

  1. Institute of Physics, National Chiao Tung University, Hsinchu, 300, Taiwan, Republic of China

    J.-Y. Lin & P. H. Lin

  2. Department of Physics, National Sun Yat-Sen University, Kaohsiung, 804, Taiwan, Republic of China

    P. L. Ho, H. L. Huang & H. D. Yang

  3. Institute of Physics, Center for Condensed Matter Physics and Beijing High Pressure Research Center, Chinese Academy of Sciences, P. O. Box 603, Beijing, 100080, People's Republic of China

    Y.-L. Zhang, R.-C. Yu & C.-Q. Jin

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  1. J.-Y. Lin
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  2. P. H. Lin
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  3. P. L. Ho
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  4. H. L. Huang
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  6. R.-C. Yu
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  7. C.-Q. Jin
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  8. H. D. Yang
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Lin, JY., Lin, P.H., Ho, P.L. et al. H c2 of MgCNi3 Determined from the Specific Heat and Resistivity Measurements. Journal of Superconductivity 15, 485–488 (2002). https://doi.org/10.1023/A:1021023725468

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  • DOI: https://doi.org/10.1023/A:1021023725468

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