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Low fractional volume superconductivity in single crystals of P⁢r4⁢N⁢i3⁢O10 under pressure

Journal Article · · Physical Review. B

Magnetotransport measurements of Pr4Ni3O10 single crystals performed under externally applied pressures up to 73 GPa in diamond anvil cells with either KBr or Nujol oil as pressure media yield signatures of superconductivity with a maximum onset temperature of approximately 31 K. True zero resistance was not observed, consistent with a nonpercolating superconducting volume fraction. Magnetization measurements provided corroborating evidence of superconductivity, with a pressure-dependent diamagnetic signal occurring below the onset temperature, and an estimate from the absolute value of the susceptibility suggests a supercon- ducting volume fraction on the order of 10%. We observe sample to sample variations in the magnitude and pressure dependence of Tc as well as a dependence on the configuration of electrical contacts on a given sample. Possible causes of this behavior may be significant inhomogeneities in the pressure and/or damage to the samples induced by the pressure media as well as inhomogeneities in the crystals themselves. Furthermore, the results imply that our as-grown Pr4Ni3O10 single crystals are not bulk superconductors but that there is a minority structure present within the crystals that is indeed superconducting.

Research Organization:
University of Illinois, Chicago, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE National Nuclear Security Administration (NNSA); U.S. National Science Foundation (NSF)
Grant/Contract Number:
NA0004153; NA0003975; AC02-07CH11358
OSTI ID:
2554043
Alternate ID(s):
OSTI ID: 2543116
OSTI ID: 2571447
OSTI ID: 2574933
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 9 Vol. 111; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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