Earticle

초록

영어

MgB2 superconductor is highly sensitive to the Mg content. Even if the samples are synthesized with the appropriate looking stoichiometric ratio, the heat treatment leads to the loss of Mg either to ambiance or to MgO. To avoid it, either excess Mg is added in the starting powder or sealed ampoule annealing is employed. In this paper the effect of open Mg sintering ambiance on the ex-situ MgB2 was studied to enhance its superconducting properties. The open Mg ambiance was created to avoid any overpressure of Mg by providing a hole in Fe tube used as sample holder. The decrease in resistivity of the synthesized sample was observed through the increased temperature dependence of electron-phonon interactions. A clear enhancement in the superconducting cross-sectional area and hence the in-field critical current density is obtained

목차

Abstract
 1. INTRODUCTION
 2. EXPERIMENTALS
 3. RESULTS AND DISCUSSION
  3.1 X-ray diffraction studies
  3.2 Resistivity Studies
  3.3 Critical current density
  3.4 Flux pinning properties
 4. CONCLUSIONS
 ACKNOWLEDGMENT
 REFERENCES

키워드

저자

• Bhavesh B. Sinha [ Functional nano-materials research department, Korea Institute of Material Science, Changwon, South Korea ]
• S. H. Jang [ Functional nano-materials research department, Korea Institute of Material Science, Changwon, South Korea ]
• Kookchae Chung [ Functional nano-materials research department, Korea Institute of Material Science, Changwon, South Korea ] Corresponding author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]

• 간기

  계간

• pISSN

  1229-3008

• eISSN

  2287-6251

• 수록기간

  1999~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 427 DDC 537