Chemical pressure effect on the superconductor MgCNi3

Uehara, M.; Amano, Tsuyoshi; Takano, Sachiko; Kôri, Tatsuya; Yamazaki, Takahiro; Kimishima, Y.

doi:10.1016/j.physc.2006.03.017

Cited by 40 publications

(20 citation statements)

References 14 publications

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“…All these attempts ultimately led to successful synthesis and some theoretical examinations of a set of Ni-rich carbides such as ZnCNi 3 , CdCNi 3 , MgCNi 3 etc. [11][12][13][14][15][16][17][18][19][20][21][22][23][24]. A detailed study of the properties of MgCNi 3 and related antiperovskite-type carbides [2][3][4][5][6] and efforts to improve their properties through chemical substitution [7][8][9][10] have also been carried out.…”

Section: Introductionmentioning

confidence: 99%

Elastic, electronic, and optical properties of hypothetical SnNNi3 and CuNNi3 in comparison with superconducting ZnNNi3

Helal¹,

Islam²

2011

Physica B: Condensed Matter

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A B S T R A C TThe elastic, electronic and optical properties of MNNi 3 (M= Zn, Sn and Cu) have been calculated using the plane-wave ultrasoft pseudopotential technique which is based on the first-principles density functional theory (DFT) with generalized gradient approximation (GGA). The optimized lattice parameters, independent elastic constants (C 11 , C 12 , and C 44 ), bulk modulus B, Compressibility K, shear modulus G, and Poisson's ratio υ, as well as the band structures, total and atom projected densities of states and finally the optical properties of MNNi 3 have been evaluated and discussed. The electronic band structures of the two hypothetical compounds show metallic behavior just like the superconducting ZnNNi 3 . Using band structures, the origin of features that appear in different optical properties of all the three compounds have been discussed. The large reflectivity of the predicted compounds in the low energy region might be good candidate materials as a coating to avoid solar heating.

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Section: Introductionmentioning

confidence: 99%

Elastic, electronic, and optical properties of hypothetical SnNNi3 and CuNNi3 in comparison with superconducting ZnNNi3

Helal¹,

Islam²

2011

Physica B: Condensed Matter

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“…Actually the emergence of ferromagnetism has been reported in carbon-deficient (Mg,Zn)C y Ni 3 (y<0.7) 7) . Several analogous materials to MgCNi 3 have been synthesized but only CdCNi 3 showed superconductivity 8) .…”

Section: Introductionmentioning

confidence: 99%

New Antiperovskite-Type Superconductor ZnN_yNi₃

Uehara

Kozawa

et al. 2009

J. Phys. Soc. Jpn.

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We have synthesized a new superconductor ZnN y Ni 3 with T c ~3 K. The crystal structure has the same anti-perovskite-type such as MgCNi 3 and CdCNi 3. As far as we know, this is the third superconducting material in Ni-based anti-perovskite series. For this material, superconducting parameters, lower critical field H c1 (0), upper critical field H c2 (0), coherence length ξ(0), penetration depth λ(0), and Gintzburg -Landau parameter κ(0) have been experimentally determined.

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“…As an alternative, there has been an immense scientific interest in related isostructural compounds so-called cubic antiperovskites of the type TCNi 3 , where T denotes either trivalent or divalent elements [1,9,[14][15][16][17][18][19][20][21][22][23]. Tong et al [22] have indicated the presence of strong electron-electron correlations in GaCNi 3 through the specific heat measurements, whereas a weak ferromagnetism has been observed in AlCNi 3 [21].…”

Section: Introductionmentioning

confidence: 99%