Zobrazeno 1 - 10 of 267 pro vyhledávání: '"Eric E. Hellstrom"'
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Akademický článek
Study of Elastic and Structural Properties of BaFe2As2 Ultrathin Film Using Picosecond Ultrasonics
Autor: Di Cheng, Boqun Song, Jong-Hoon Kang, Chris Sundahl, Anthony L. Edgeton, Liang Luo, Joong-Mok Park, Yesusa G. Collantes, Eric E. Hellstrom, Martin Mootz, Ilias E. Perakis, Chang-Beom Eom, Jigang Wang
Publikováno v: Materials, Vol 16, Iss 21, p 7031 (2023)
We obtain the through-thickness elastic stiffness coefficient (C33) in nominal 9 nm and 60 nm BaFe2As2 (Ba-122) thin films by using picosecond ultrasonics. Particularly, we reveal the increase in elastic stiffness as film thickness decreases from bul
Externí odkaz: https://doaj.org/article/d68da1abdaf049a99f1e739752d15ebe
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2
Akademický článek
Effect of heat treatments on superconducting properties and connectivity in K-doped BaFe2As2
Autor: Chiara Tarantini, Chongin Pak, Yi-Feng Su, Eric E. Hellstrom, David C. Larbalestier, Fumitake Kametani
Publikováno v: Scientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
Abstract Fe-based superconductors and in particular K-doped BaFe2As2 (K-Ba122) are materials of interest for possible future high-field applications. However the critical current density (J c ) in polycrystalline Ba122 is still quite low and connecti
Externí odkaz: https://doaj.org/article/b93ab901e05e4a3bbf3e77a8bb195235
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7
Effects of Wire Diameter and Filament Size on the Processing Window of Bi-2212 Round Wire
Autor: Eric E. Hellstrom, Fumitake Kametani, Ulf P. Trociewitz, Jianyi Jiang, Evan Miller, S. Imam Hossain, David C. Larbalestier, Shaon Barua, Yavuz Oz, Jonathan Cooper, Y. Huang, Jeff Parrell, T. Abiola Oloye
Publikováno v: IEEE Transactions on Applied Superconductivity. 31:1-6
High engineering critical current density ( JE of 1300 A/mm2 at 4.2 K and 15 T) in Bi-2212 round wire has been achieved through a partial melt, overpressure heat treatment process. JE varies strongly with processing conditions, particularly the maxim
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c3988e8286d25e0f6391f84b7e9d576a
https://doi.org/10.1109/tasc.2021.3055475
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10
Prediction of the JC (B) Behavior of Bi-2212 Wires at High Field
Autor: Griffin Bradford, David C. Larbalestier, Jan Jaroszynski, Dmytro Abraimov, Michael D. Brown, Jianyi Jiang, Eric E. Hellstrom, Chiara Tarantini
Publikováno v: IEEE Transactions on Applied Superconductivity. 29:1-4
Bi-2212 wires have been produced for much of the last decade with varying architectures, powder sources, and great variability of final J C (B) properties. As Bi-2212 transitions from an R&D materials development to a magnet technology, means to pred
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::637a0f4f48250289dbe0cc8bad1c1e5c
https://doi.org/10.1109/tasc.2019.2899226
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