Evidence that the upper critical field of Nb3Sn is independent of whether it is cubic or tetragonal

Jian Zhou; Younjung Jo; Zu Hawn Sung; Haidong Zhou; Peter J. Lee; David C. Larbalestier

doi:10.1063/1.3643055

Evidence that the upper critical field of Nb₃Sn is independent of whether it is cubic or tetragonal

Jian Zhou, Younjung Jo, Zu Hawn Sung, Haidong Zhou, Peter J. Lee, David C. Larbalestier

National High Magnetic Field Laboratory

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Although 2011 marks the 50th anniversary of Nb₃Sn as the first high field superconductor, real understanding of its upper critical field behavior H_c2 is incomplete. Here, we show surprising H_c2 data on highly homogeneous bulk samples that exhibit identical upper critical field H_c2(0.3 K) ∼ 29 0.2 T with or without undergoing the cubic-to-tetragonal transition, a result in strong contrast to widely used multiple-source data compilations that show a strong depression of H_c2(0 K) from 29 T to 21.4 T in the tetragonal state.

Original language	English
Article number	122507
Journal	Applied Physics Letters
Volume	99
Issue number	12
DOIs	https://doi.org/10.1063/1.3643055
State	Published - 19 Sep 2011

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abstract = "Although 2011 marks the 50th anniversary of Nb3Sn as the first high field superconductor, real understanding of its upper critical field behavior Hc2 is incomplete. Here, we show surprising Hc2 data on highly homogeneous bulk samples that exhibit identical upper critical field Hc2(0.3 K) ∼ 29 0.2 T with or without undergoing the cubic-to-tetragonal transition, a result in strong contrast to widely used multiple-source data compilations that show a strong depression of Hc2(0 K) from 29 T to 21.4 T in the tetragonal state.",

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AU - Zhou, Jian

AU - Jo, Younjung

AU - Hawn Sung, Zu

AU - Zhou, Haidong

AU - Lee, Peter J.

AU - Larbalestier, David C.

PY - 2011/9/19

Y1 - 2011/9/19

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AB - Although 2011 marks the 50th anniversary of Nb3Sn as the first high field superconductor, real understanding of its upper critical field behavior Hc2 is incomplete. Here, we show surprising Hc2 data on highly homogeneous bulk samples that exhibit identical upper critical field Hc2(0.3 K) ∼ 29 0.2 T with or without undergoing the cubic-to-tetragonal transition, a result in strong contrast to widely used multiple-source data compilations that show a strong depression of Hc2(0 K) from 29 T to 21.4 T in the tetragonal state.

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Evidence that the upper critical field of Nb₃Sn is independent of whether it is cubic or tetragonal

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