Study of the magnetic properties of YbMn(2)Sb2 single crystals by mu SR

Autor(es)

Munevar, J. ^{[1, 2]} ; Arantes, F. R. ^[2] ; Mendonca-Ferreira, L. ^[2] ; Avila, M. A. ^[2] ; Ribeiro, R. A. ^{[3, 2]}

Afiliação do(s) autor(es)

^[1] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen - Switzerland

^[2] Univ Fed ABC UFABC, CCNH, Ave Estados 5001, BR-09210580 Santo Andre, SP - Brazil

^[3] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 - USA

• Tipo de documento: Artigo Científico
• Fonte: Journal of Magnetism and Magnetic Materials; v. 537, NOV 1 2021.
• Citações Web of Science: 0

Resumo

The crystal growth and the structural, transport and magnetic properties of YbMn2Sb2 single crystals are reported. The crystals show a trigonal symmetry of La2O2S-type structure (space group P3 over line m1, N. 164, hP5), where corrugated honeycomb layers of MnSb are separated by Yb atoms. No structural phase transition was observed down to 22 K. The resistivity measurements show a predominantly insulating behavior. The combined resistivity, dc susceptibility and specific heat measurements confirm successive features at 40 K, 116 K and 225 K, being the phase transition at T-N=116 K due to the Mn+2 lattice antiferromagnetic ordering. Muon spin rotation experiments (mu SR) reveal a more complicated scenario, with temperature dependence of the magnetic volume fraction reflecting a static and strongly disordered magnetic ground state. The role of spin-lattice coupling and its relationship with exchange interactions between Mn moments is discussed as a possible cause of the magnetic behavior observed. (AU)

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