Magnetic measurements in superconducting cerium superhydrides in a diamond anvil cell
ORAL
Abstract
Cerium superhydrides were reported to exhibit superconducting transition temperatures above 100 K at pressures around 100 GPa [1,2]. In this work, we present bulk magnetic characterization – low field temperature-dependent magnetization, trapped-flux magnetization, and flux-creep measurements – of CeHx (x = 9-10) superconductors under pressure exceeding 100 GPa in a miniature non-magnetic diamond pressure cell.
The overall behavior is similar to that observed in other hydrogen-rich compounds [3,4], and in well-established ambient-pressure superconductors [5]. Details of the experimental protocols and the obtained results will be discussed. All in all, these findings corroborate the feasibility and reliability of bulk magnetic measurements for studying superconductors at multi-megabar pressures.
[1] W. Chen et al., Phys. Rev. Lett. 127, 117001 (2021)
[2] P. Bhattacharyya et al., Nature 627, 73 (2024)
[3] V. S. Minkov et al., Nat. Commun. 13, 3194 (2022)
[4] V. S. Minkov et al., Nat. Phys. 19, 1293 (2023)
[5] S. L. Bud’ko et al., Supercond. Sci. Technol. 36, 115001 (2023)
The overall behavior is similar to that observed in other hydrogen-rich compounds [3,4], and in well-established ambient-pressure superconductors [5]. Details of the experimental protocols and the obtained results will be discussed. All in all, these findings corroborate the feasibility and reliability of bulk magnetic measurements for studying superconductors at multi-megabar pressures.
[1] W. Chen et al., Phys. Rev. Lett. 127, 117001 (2021)
[2] P. Bhattacharyya et al., Nature 627, 73 (2024)
[3] V. S. Minkov et al., Nat. Commun. 13, 3194 (2022)
[4] V. S. Minkov et al., Nat. Phys. 19, 1293 (2023)
[5] S. L. Bud’ko et al., Supercond. Sci. Technol. 36, 115001 (2023)
*Work in Ames was supported by US DOE, BES, under Contract No. DE-AC02-07CH11358 and LDRD at the Ames National Laboratory.
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Presenters
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Sergey L Bud'ko
- Iowa State University