Structural and Superconducting Property Variations with Nominal Mg Non-Stoichiometry in Mg_xB_2 and Its Enhancement of Upper Critical Field

Soo K. Chen; Adriana Serquis; German Serrano; Karen A. Yates; Mark G Blamire; Douglas Guthrie; John Cooper; Haiyan Wang; Serena Margadonna; Judith L. MacManus-Driscoll

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Structural and Superconducting Property Variations with Nominal Mg Non-Stoichiometry in Mg_xB_2 and Its Enhancement of Upper Critical Field

机译：Mg_xB_2中名义Mg非化学计量比的结构和超导性质变化及其上临界场的增强

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By applying a combination of characterisation tools, changes in structural and superconducting properties with nominal Mg non-stoichiometry in Mg_xB_2 are found. The non-stoichiometry produces enhanced in-field critical current densities (J_c's) and upper critical field/irreversibility field (H_(c2)/H_(irr)(T)) values. Upper critical fields of ～ 21 T (4.2 K) were obtained in nominal Mg-deficient samples compared to ～ 17 T (4.2 K) for near-stoichiometric samples.

机译：通过组合使用表征工具，发现Mg_xB_2中标称的Mg非化学计量比的结构和超导特性发生了变化。非化学计量法产生增强的场内临界电流密度（J_c's）和上临界场/不可逆场（H_（c2）/ H_（irr）（T））值。在标称的缺镁样品中，获得的最高临界场为〜21 T（4.2 K），相比之下，近化学计量样品的最高临界场为〜17 T（4.2 K）。

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《Advanced Functional Materials》 |2008年第1期|p.113-120|共8页
作者
Soo K. Chen; Adriana Serquis; German Serrano; Karen A. Yates; Mark G Blamire; Douglas Guthrie; John Cooper; Haiyan Wang; Serena Margadonna; Judith L. MacManus-Driscoll;
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正文语种 eng
中图分类无线电电子学、电信技术;
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机译：非中心对称重费米子超导体中接近量子临界的上临界场的巨大增强：Cerhsi_3和Ceirsi_3
2. Evidence for Pauli-limiting behaviour at high fields and enhanced upper critical fields near T_c in several disordered FeAs based superconductors [J] . Fuchs G., Drechsler S.-L., Kozlova N., Physica, C. Superconductivity and its applications . 2010,第Suppla期

机译：几种无序FeAs基超导体在T_c附近高场和增强的上临界场的Pauli限制行为的证据
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4. Enhancement of critical temperature and upper critical field due to Nb substitution in Zr-V alloy superconductors [C] . Sabyasachi Paul, S. K. Ramjan, L. S. Sharath Chandra, DAE Solid State Physics Symposium . 2020

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5. PART I. UPPER CRITICAL FIELDS AND SPAN STATES IN A-15 SUPERCONDUCTORS. PART II. VORTICES IN TWO-DIMENSIONAL SUPERCONDUCTORS. [D] . ORLANDO, TERRY PHILIP. 1981

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6. Direct measurement of the upper critical field in cuprate superconductors [O] . G. Grissonnanche, O. Cyr-Choinière, F. Laliberté, -1

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7. Colossal enhancement of upper critical fields in noncentrosymmetric heavy fermion superconductors near quantum criticality: CeRhSi$_3$ and CeIrSi$_3$ [O] . Tada, Y., Kawakami, N., Fujimoto, S. 2008

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8. Theory of Critical Currents and Perpendicular Upper Critical Fields for Superconducting Proximity Systems [R] . Biagi, K. R. 1985

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Structural and Superconducting Property Variations with Nominal Mg Non-Stoichiometry in Mg_xB_2 and Its Enhancement of Upper Critical Field

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