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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

High-pressure studies on heavy-fermion antiferromagnet CeCuBi2

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Piva, M. M. [1, 2] ; Ajeesh, M. O. [2] ; Christovam, D. S. [1] ; dos Reis, R. D. [3, 2] ; Jesus, C. B. R. [1, 4] ; Rosa, P. F. S. [5, 1] ; Adriano, C. [1] ; Urbano, R. R. [1] ; Nicklas, M. [2] ; Pagliuso, P. G. [1]
Total Authors: 10
[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[2] Max Planck Inst Chem Phys Solids, Nothnitzer Str 40, D-01187 Dresden - Germany
[3] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Synchrotron Light Lab LNLS, BR-13083970 Campinas, SP - Brazil
[4] Univ Fed Sergipe, Programa Posgrad Fis, Campus Prof Jose Aluisio de Campos, BR-49100000 Sao Cristovao, SE - Brazil
[5] Los Alamos Natl Lab, Los Alamos, NM 87545 - USA
Total Affiliations: 5
Document type: Journal article
Source: JOURNAL OF PHYSICS-CONDENSED MATTER; v. 30, n. 37 SEP 19 2018.
Web of Science Citations: 0

We report in-plane electrical resistivity studies of CeCuBi2 and LaCuBi2 single crystals under applied pressure. At ambient pressure, CeCuBi2 is a c-axis Ising antiferromagnet with a transition temperature T-N approximate to 16 K. In a magnetic field applied along the c-axis at T approximate to 2 K a spin-flop transition takes place H-flip approximate to 5.7 T. Applying pressure on CeCuBi2 suppresses T-N at a slow rate. T-N(P) extrapolates to zero temperature at P-c approximate to 7 GPa. The critical field of the spin-flop transition H-flip(P) displays a maximum of 6.8 T at P approximate to 4 GPa. At low temperatures, a zero-resistance superconducting state emerges upon the application of external pressure having a maximum T-c of 7 K at 2.6 GPa in CeCuBi2. High-pressure electrical-resistivity experiments on the non-magnetic reference compound LaCuBi2 reveal also a zero resistance state with similar critical temperatures in the same pressure range as CeCuBi2. The great similarity between the superconducting properties of both materials and elemental Bi suggests a common origin of the superconductivity. We discuss that the appearance of this zero resistance state superconductivity may be related to the Bi layers present in the crystalline structure of both compounds and, therefore, could be intrinsic to CeCuBi2 and LaCuBi2, however further experiments under pressure are necessary to clarify this issue. (AU)

FAPESP's process: 17/10581-1 - Emergent phenomena in reduced dimension systems
Grantee:Pascoal Jose Giglio Pagliuso
Support type: Research Projects - Thematic Grants
FAPESP's process: 12/04870-7 - Studies of novel complex and advanced materials
Grantee:Pascoal Jose Giglio Pagliuso
Support type: Research Projects - Thematic Grants
FAPESP's process: 15/15665-3 - Studies of orbital differentiation effects in the magnetic and superconducting properties of FeAs based compounds
Grantee:Mário Moda Piva
Support type: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 12/05903-6 - Nuclear magnetic resonance of novel complex and advanced materials in condensed matter physics
Grantee:Ricardo Rodrigues Urbano
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 17/25269-3 - High pressure studies in SrFe2As2, CaMn2Bi2 and CeAuBi2 compounds
Grantee:Mário Moda Piva
Support type: Scholarships abroad - Research Internship - Doctorate (Direct)