Electronic and magnetic properties of stoichiometric CeAuBi2

Author(s):Show less -

Piva, M. M. ; Tartaglia, R. ; Freitas, G. S. ; Souza, J. C. ; Christovam, D. S. ; Thomas, S. M. ; Leao, J. B. ; Ratcliff, W. ; Lynn, J. W. ; Lane, C. ; Zhu, J-X ; Thompson, J. D. ; Rosa, P. F. S. ; Adriano, C. ; Granado, E. ; Pagliuso, P. G.

• Document type: Journal article
• Source: PHYSICAL REVIEW B; v. 101, n. 21, p. 7-pg., 2020-06-18.

Abstract

We report the electronic and magnetic properties of stoichiometric CeAuBi2 single crystals. At ambient pressure, CeAuBi2 orders antiferromagnetically below a Neel temperature (T-N) of 19 K. Neutron diffraction experiments revealed an antiferromagnetic propagation vector (tau) over cap = [0, 0, 1/2], which doubles the paramagnetic unit cell along the c axis. At low temperatures several metamagnetic transitions are induced by the application of fields parallel to the c axis, suggesting that the magnetic structure of CeAuBi2 changes as a function of field. At low temperatures, a linear positive magnetoresistance may indicate the presence of band crossings near the Fermi level. Finally, the application of external pressure favors the antiferromagnetic state, indicating that the 4f electrons become more localized. (AU)

• FAPESP's process: 18/11364-7 - Magnetic properties of complex systems with non-trivial topology
• Grantee: Jean Carlo Souza
• Support Opportunities: Scholarships in Brazil - Doctorate
• 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 Opportunities: Scholarships in Brazil - Doctorate (Direct)
• 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 Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 17/25269-3 - High pressure studies in SrFe2As2, CaMn2Bi2 and CeAuBi2 compounds
• Grantee: Mário Moda Piva
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)
• FAPESP's process: 17/10581-1 - Emergent phenomena in reduced dimension systems
• Grantee: Pascoal Jose Giglio Pagliuso
• Support Opportunities: Special Projects