Trapped flux in a small crystal of CaKFe${}_4$As${}_4$ at ambient pressure and in a diamond anvil pressure cell

Abstract

In an extension of our previous work, [Sergey L Bud'ko et al 2023 Supercond. Sci. Technol. 36 115001] the measurements of temperature dependent magnetization associated with trapped magnetic flux in a small single crystal of CaKFe${}_4$As${}_4$, using zero-field-cooled and field-cooled protocols were performed, on the same crystal, at ambient pressure without a pressure cell and at 2.2 GPa in a commercial diamond anvil cell (DAC), showing comparable results. The data show that with a proper care and understanding, trapped flux measurements in superconductors indeed can be performed on samples in DACs under pressure, as was done on superhydrides [V S Minkov et al 2023 Nat. Phys. 19 1293].

References in corpus (4)

• High-temperature superconductivity in hydrides: experimental evidence and details
• Trapped magnetic flux in hydrogen-rich high-temperature superconductors
• Evidence against superconductivity in flux trapping experiments on hydrides under high pressure & On magnetic field screening and expulsion in hydride superconductors
• SquidLab -- a user-friendly program for background subtraction and fitting of magnetization data

Cited by in corpus (3)

• On the trapped magnetic moment in type-II superconductors
• Comment on "Trapped flux in a small crystal of CaKFe${}_4$As${}_4$ at ambient pressure and in a diamond anvil pressure cell" by S. L. Bud'ko et al
• The observation of bulk superconductivity in Rhombohedral ReO3 under pressure