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A new class of ferromagnetic semiconductor: Copper molybdate organic-inorganic compound with phenanthroline organic linkers

Journal Article


Abstract


  • A three-dimensional (3D) framework of covalently-bonded layers of bimetallic inorganic oxide, CuMoO4, interlinked by electron-rich organic ligands, which is semiconducting and also ferromagnetic, has been prepared. The structure [Cu(3,8-phenanthroline)0.5MoO4] consists of molybdate tetrahedra corner-shared with clusters of edge-sharing {CuO5N} octahedra. The injection of charge carriers into the inorganic layers by phenanthroline induces different magnetic orderings at different temperatures, orderings which are not found in the structurally-similar [Cu(4,4ʹ-bipyridine)0.5MoO4]. The temperature dependence of the susceptibility shows two low temperature magnetic transitions: weakly ferromagnetic-coupled spins below 15 K coexisting with an antiferromagnetic structure below 10 K. Specific heat capacity shows a finite ground-state electronic specific heat coefficient, γ = 0.094 J/mol·K2, that is higher than that of the bipyridine counterpart (0.068 J/mol·K2), confirming an increase in the electronic density-of-states in the phenanthroline system.

Publication Date


  • 2020

Citation


  • Islah-u-din., Chong, S. V., Jameson, G. B., Raymond, S. G., Lee, G., Park, I. K., . . . Tallon, J. L. (2020). A new class of ferromagnetic semiconductor: Copper molybdate organic-inorganic compound with phenanthroline organic linkers. Journal of Magnetism and Magnetic Materials, 508. doi:10.1016/j.jmmm.2020.166881

Scopus Eid


  • 2-s2.0-85083035183

Web Of Science Accession Number


Volume


  • 508

Abstract


  • A three-dimensional (3D) framework of covalently-bonded layers of bimetallic inorganic oxide, CuMoO4, interlinked by electron-rich organic ligands, which is semiconducting and also ferromagnetic, has been prepared. The structure [Cu(3,8-phenanthroline)0.5MoO4] consists of molybdate tetrahedra corner-shared with clusters of edge-sharing {CuO5N} octahedra. The injection of charge carriers into the inorganic layers by phenanthroline induces different magnetic orderings at different temperatures, orderings which are not found in the structurally-similar [Cu(4,4ʹ-bipyridine)0.5MoO4]. The temperature dependence of the susceptibility shows two low temperature magnetic transitions: weakly ferromagnetic-coupled spins below 15 K coexisting with an antiferromagnetic structure below 10 K. Specific heat capacity shows a finite ground-state electronic specific heat coefficient, γ = 0.094 J/mol·K2, that is higher than that of the bipyridine counterpart (0.068 J/mol·K2), confirming an increase in the electronic density-of-states in the phenanthroline system.

Publication Date


  • 2020

Citation


  • Islah-u-din., Chong, S. V., Jameson, G. B., Raymond, S. G., Lee, G., Park, I. K., . . . Tallon, J. L. (2020). A new class of ferromagnetic semiconductor: Copper molybdate organic-inorganic compound with phenanthroline organic linkers. Journal of Magnetism and Magnetic Materials, 508. doi:10.1016/j.jmmm.2020.166881

Scopus Eid


  • 2-s2.0-85083035183

Web Of Science Accession Number


Volume


  • 508