• 제목/요약/키워드: Applied Research

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중간금속성 $YNi_{2}$$B_{2}$C 초전도체의 상부임계자기장($H_{c2}$) 연구 (The upper critical field (($H_{c2}$) study of intermetallic $YNi_{2}$$B_{2}$C superconductor)

  • 송규정;이남진;고락길;박찬;하홍수;하동우;오상수;권영길
    • 한국초전도저온공학회:학술대회논문집
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    • 한국초전도저온공학회 2002년도 학술대회 논문집
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    • pp.168-170
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    • 2002

  • Magnetization studies were conducted on a single crystal of $YNi_{2}$$B_{2}$C superconductor. The 17 mg crystal was studied at temperatures T from above $T_{c}$ (15.5 K) to 3 K, in the magnetic fields H // c-axis up to 6 tesla. The crystal exhibited little magnetic irreversibility, with a critical current density $CO_{3}$ ~ $10^{-4}$ $\times$ $CO_{3}$, the depairing current density. Near $T_{c}$, the equilibrium magnetization M was London-like with M $\infty$ In(H). The upper critical field $H_{c2}$ of the single crystal $YNi_{2}$$B_{2}$C was estimated by the several alternative approaches such as standard London limit, Ginzburg-Landau, and Abrikosov relations. The estimated $H_{c2}$values agree relatively well with each other approaches.

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