Electronic and magnetic properties of stoichiometric CeAuBi 2 .

Autor:	Piva MM; Instituto de Física 'Gleb Wataghin', UNICAMP, 13083-859, Campinas, São Paulo, Brazil.; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.; Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, D-01187 Dresden, Germany., Tartaglia R; Instituto de Física 'Gleb Wataghin', UNICAMP, 13083-859, Campinas, São Paulo, Brazil., Freitas GS; Instituto de Física 'Gleb Wataghin', UNICAMP, 13083-859, Campinas, São Paulo, Brazil., Souza JC; Instituto de Física 'Gleb Wataghin', UNICAMP, 13083-859, Campinas, São Paulo, Brazil., Christovam DS; Instituto de Física 'Gleb Wataghin', UNICAMP, 13083-859, Campinas, São Paulo, Brazil., Thomas SM; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Leão JB; NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA., Ratcliff W; NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA., Lynn JW; NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA., Lane C; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Zhu JX; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Thompson JD; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Rosa PFS; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Adriano C; Instituto de Física 'Gleb Wataghin', UNICAMP, 13083-859, Campinas, São Paulo, Brazil., Granado E; Instituto de Física 'Gleb Wataghin', UNICAMP, 13083-859, Campinas, São Paulo, Brazil., Pagliuso PG; Instituto de Física 'Gleb Wataghin', UNICAMP, 13083-859, Campinas, São Paulo, Brazil.
Jazyk:	angličtina
Zdroj:	Physical review. B [Phys Rev B] 2020 Jun; Vol. 101 (21).
DOI:	10.1103/PhysRevB.101.214431
Abstrakt:	We report the electronic and magnetic properties of stoichiometric CeAuBi 2 single crystals. At ambient pressure, CeAuBi 2 orders antiferromagnetically below a Néel temperature ( T N ) of 19 K. Neutron diffraction experiments revealed an antiferromagnetic propagation vector τ ^ = [ 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 CeAuBi 2 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 4 f electrons become more localized.
Databáze:	MEDLINE
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