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Double Helix of Icosahedra Structure and Spin Glass Magnetism of the δ-Co2.5Zn17.5-xMnx (x = 0.4-3.5) Pseudo-Binary Alloys.
Mondal, Amit; Dey, Riju; Jelen, Andreja; Kozelj, Primoz; Kuila, Sandip Kumar; Pan, Rahul; Vrtnik, Stanislav; Luzar, Joze; Wencka, Magdalena; Petrovic, Julia; Mihor, Peter; Jaglicic, Zvonko; Meden, Anton; Jana, Partha Pratim; Dolinsek, Janez.
Afiliación
  • Mondal A; Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India.
  • Dey R; Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India.
  • Jelen A; J. Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.
  • Kozelj P; J. Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.
  • Kuila SK; Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, SI-1000 Ljubljana, Slovenia.
  • Pan R; Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India.
  • Vrtnik S; Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India.
  • Luzar J; J. Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.
  • Wencka M; J. Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.
  • Petrovic J; J. Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.
  • Mihor P; Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, PL-60-179 Poznan, Poland.
  • Jaglicic Z; J. Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.
  • Meden A; J. Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.
  • Jana PP; Faculty of Civil and Geodetic Engineering, Institute of Mathematics, Physics and Mechanics & University of Ljubljana, Jadranska 19, SI-1000 Ljubljana, Slovenia.
  • Dolinsek J; Faculty of Chemistry and Chemical Technology, University of Ljubljana, Vecna pot 113, SI-1000 Ljubljana, Slovenia.
Inorg Chem ; 63(22): 10251-10263, 2024 Jun 03.
Article en En | MEDLINE | ID: mdl-38769094
ABSTRACT
We have synthesized δ-Co2.5Zn17.5-xMnx (x = 0.4-3.5) pseudo-binary alloys of 10 different compositions by a high-temperature solid-state synthetic route, determined their crystal structures and the Mn substitution pattern, and estimated the existence range of the δ-phase. The alloys crystallize in two chiral enantiomorphic space groups P62 and P64, where the basic atomic polyhedron of the chiral structure is an icosahedron and the neighboring icosahedra share vertices to form an infinitely long double helix along the hexagonal axis (like in the δ-Co2.5Zn17.5 parent binary phase). The alloys are pure δ-phase up to the Mn content x ≈ 3.5. The Mn atoms partially substitute Zn atoms at particular crystallographic sites located on the icosahedra. The study of magnetism was performed on the Co2.5Zn17.1Mn0.4 alloy with the lowest Mn content. Contrary to the expectation that structural chirality may induce the formation of a nontrivial magnetic state, a spin glass state with no relation to the structural chirality was found. The magnetic sublattice contains all of the necessary ingredients (randomness and frustration) for the formation of a spin glass state. Typical out-of-equilibrium dynamic phenomena of a spin system with broken ergodicity were detected below the spin freezing temperature Tf ≈ 8 K.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Inorg Chem Año: 2024 Tipo del documento: Article País de afiliación: India Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Inorg Chem Año: 2024 Tipo del documento: Article País de afiliación: India Pais de publicación: Estados Unidos