@article{
 title = {Specific heat of Nb 3 Sn : The case for a second energy gap},
 type = {article},
 year = {2004},
 identifiers = {[object Object]},
 pages = {184526},
 volume = {70},
 websites = {http://www.scopus.com/inward/record.url?eid=2-s2.0-12144279120&partnerID=tZOtx3y1},
 month = {11},
 day = {29},
 id = {e834b39c-0d4d-37e8-9949-869b073f967f},
 created = {2015-12-03T11:11:06.000Z},
 accessed = {2015-12-02},
 file_attached = {false},
 profile_id = {9495636f-d73f-34d2-b6ff-fe5dfa3a8841},
 group_id = {7a3bc460-f939-3cef-a7d0-3ac6b86952c3},
 last_modified = {2015-12-03T11:11:06.000Z},
 read = {false},
 starred = {false},
 authored = {false},
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 abstract = {We present specific-heat data for Nb3Sn, a well-known technically applied superconductor with a critical temperature Tc ≅ 18 K, in the temperature range from 1.2 to 200 K in zero magnetic field, and from 1.5 to 22 K in fields H ≤ 16 T. The particularly dense and homogeneous polycrystalline sample used for this study is characterized in detail. We determine the bulk upper critical field Hc2(T) from specific-heat data, and the Sommerfeld constant γ from the entropy S(T). We investigate in detail a low-temperature anomaly already noticed in previous investigations in zero field, and find that this feature can be quantitatively ascribed to the presence of a second superconducting gap 2ΔS(0) ≅ 0.8kBTc, in addition to the main one 2ΔL(0) ≅ 4.9kBTc. The signature of this minor gap, which affects 7.5% of the electronic density-of-states, vanishes in high fields.},
 bibtype = {article},
 author = {Guritanu, V. and Goldacker, W. and Bouquet, F. and Wang, Y. and Lortz, R. and Goll, G. and Junod, A.},
 journal = {Physical Review B},
 number = {18}
}

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