Artículos de revistas
Role Of Dimensionality In The Kondo Cet X-2 Family: The Case Of Cecd0.7sb2
Registro en:
Role Of Dimensionality In The Kondo Cet X-2 Family: The Case Of Cecd0.7sb2. Amer Physical Soc, v. 92, p. OCT-2015.
1098-0121
WOS:000363521800003
10.1103/PhysRevB.92.134421
Autor
Rosa
P. F. S.; Bourg
R. J.; Jesus
C. B. R.; Pagliuso
P. G.; Fisk
Z.
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Motivated by the presence of competing magnetic interactions in the heavy fermion family CeT X-2 (T = transition metal, X = pnictogen), here we study the novel parent compound CeCd0.7Sb2 by combining magnetization, electrical resistivity, and heat-capacity measurements. Contrary to the antiferromagnetic (AFM) ground state observed in most members of this family, the magnetic properties of our CeCd0.7Sb2 single crystals revealed a ferromagnetic ordering at T-c = 3 K with an unusual soft behavior. By using a mean field model including anisotropic nearest-neighbor interactions and the tetragonal crystalline electric field (CEF) Hamiltonian, a systematic analysis of our macroscopic data was obtained. Our fits allowed us to extract a simple but very distinct CEF scheme, as compared to the AFM counterparts. As in the previously studied ferromagnet CeAgSb2, a pure vertical bar +/- 1/2 > ground state is realized, hinting at a general trend within the ferromagnetic members. More generally, we propose a scenario for the understanding of the magnetism in this family of compounds based on the subtle changes of dimensionality in the crystal structure. 92 13
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) FAPESP [2013/17427-7, 2013/20181-0, 2012/04870-7]