Tuning the crystalline electric field and magnetic anisotropy along the CeCuBi2-xSbx series

Author(s):Show less -

Freitas, G. S. ^[1] ; Piva, M. M. ^{[2, 1]} ; Grossi, R. ^[1] ; Jesus, C. B. R. ^[3] ; Souza, J. C. ^[1] ; Christovam, D. S. ^[1] ; Oliveira, N. F. ^[4] ; Leao, J. B. ^[5] ; Adriano, C. ^[1] ; Lynn, J. W. ^[5] ; Pagliuso, P. G. ^[1]

Affiliation

^[1] Univ Estadual Campinas, Gleb Wataghin Inst Phys, UNICAMP, BR-13083859 Campinas, SP - Brazil

^[2] Max Planck Inst Chem Phys Solids, Nothnitzer Str 40, D-01187 Dresden - Germany

^[3] Univ Fed Sergipe UFS, Dept Fis, BR-49100000 Itabaiana, Sergipe - Brazil

^[4] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, SP - Brazil

^[5] NIST, NIST Ctr Neutron Res, Gaithersburg, MD 20899 - USA

• Document type: Journal article
• Source: Physical Review B; v. 102, n. 15 OCT 20 2020.
• Web of Science Citations: 0

Abstract

We have performed x-ray powder diffraction, magnetization, electrical resistivity, heat capacity, and inelastic neutron scattering (INS) to investigate the physical properties of the intermetallic series of compounds, CeCuBi2-xSbx. These compounds crystallize in a tetragonal structure with space group P4/nmm and present antiferromagnetic transition temperatures ranging from 3.6 to 16 K. Remarkably, the magnetization easy axis changes along the series, which is closely related to the variations of the tetragonal crystalline electric-field (CEF) parameters. This evolution was analyzed using a mean-field model, which included anisotropic nearest-neighbor interactions and the tetragonal CEF Hamiltonian. The CEF parameters were obtained by fitting the magnetic susceptibility data with the constraints given by the INS measurements. Finally, we discuss how this CEF evolution can affect the Kondo physics and the search for a superconducting state in this family. (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: 17/25269-3 - High pressure studies in SrFe2As2, CaMn2Bi2 and CeAuBi2 compounds
• Grantee: Mário Moda Piva
• Support type: Scholarships abroad - Research Internship - Doctorate (Direct)
• FAPESP's process: 18/11364-7 - Magnetic properties of complex systems with non-trivial topology
• Grantee: Jean Carlo Souza
• Support type: Scholarships in Brazil - Doctorate
• FAPESP's process: 15/16191-5 - The research in new materials involving high magnetic fields and low temperatures
• Grantee: Gennady Gusev
• Support type: Research Projects - Thematic Grants
• FAPESP's process: 19/04196-3 - Investigation of crystalline electric field effects in magnetic and superconducting states in the Ce2RhIn8-xCdx compounds
• Grantee: Denise Sacramento Christovam
• Support type: Scholarships in Brazil - Master
• 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: 19/26247-9 - Emergent phenomena in Bi-based systems with low dimensionality
• Grantee: Gabriel Silva Freitas
• Support type: Scholarships in Brazil - Doctorate