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Lee, Geunsik
Electronic Structure and Transport in Condensed Materials
Research Interests
  • open quantum system, non-equilibrium electron transport
  • electron correlation, dynamical mean field theory
  • 2D materials, metal complexes

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

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Title
A new class of ferromagnetic semiconductor: Copper molybdate organic-inorganic compound with phenanthroline organic linkers
Author
Islah-u-dinChong, Shen, VJameson, Geoffrey B.Raymond, Sebastiampillai G.Lee, GeunsikPark, In K.Wang, XiaolinWaterland, Mark R.Tallon, Jeffery L.
Issue Date
2020-08
Publisher
ELSEVIER
Citation
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, v.508, pp.166881
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)(0.5)MoO4] 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 structurallysimilar [Cu(4,4'-bipyridine)(0.5)MoO4]. The temperature dependence of the susceptibility shows two low temperature magnetic transitions: weakly ferromagnetic-coupled spins below 15 K coexisting with an anti-ferromagnetic structure below 10 K. Specific heat capacity shows a finite ground-state electronic specific heat coefficient, gamma = 0.094 J/mol.K-2, that is higher than that of the bipyridine counterpart (0.068 J/mol.K-2), confirming an increase in the electronic density-of-states in the phenanthroline system.
URI
https://scholarworks.unist.ac.kr/handle/201301/32051
URL
https://www.sciencedirect.com/science/article/pii/S0304885319341824
DOI
10.1016/j.jmmm.2020.166881
ISSN
0304-8853
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