Journal ArticleDOI
Crystal growth, thermal stability, and electrical properties of LiCu2O2
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TLDR
LiCu2O2 single crystals up to 6 × 10 × 10 mm in dimensions are grown by slow melt cooling and are characterized by thermal analysis, dc and ac (0.1-100 kHz) resistivity measurements from 20 to 300 K, and thermoelectric power measurements in the range 130-300 K as mentioned in this paper.Abstract:
LiCu2O2 single crystals up to 6 × 10 × 10 mm in dimensions are grown by slow melt cooling and are characterized by thermal analysis, dc and ac (0.1–100 kHz) resistivity measurements from 20 to 300 K, and thermoelectric power measurements in the range 130–300 K. The temperature stability range of LiCu2O2 is 890–1050°C, and its cation composition may experience deviations from stoichiometry. LiCu2O2 is shown to be a p-type semiconductor. Between 80 and 260 K, its dc resistivity follows Mott's law, ρ = A exp(T
0/T)1/4, and charge transport is dominated by hopping conduction between localized states near the Fermi level.read more
Citations
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Journal ArticleDOI
Electronic structure of one-dimensional copper oxide chains in LiCu2O2 from angle-resolved photoemission and optical spectroscopy
M. Papagno,M. Papagno,D. Pacilé,D. Pacilé,G. Caimi,Helmuth Berger,Leonardo Degiorgi,Marco Grioni +7 more
TL;DR: In this article, angle-resolved photoemission (ARPES) and optical measurements were performed on single crystal samples of LiCu2O2, an antiferromagnetic S = 1/2 spin-chain compound.
Journal ArticleDOI
Thermodynamic investigations of copper oxides used as conversion type electrodes in lithium ion batteries
Maren Lepple,Robert Adam,Damian M. Cupid,Peter Franke,Thomas Bergfeldt,Daniel Wadewitz,David Rafaja,Hans Jürgen Seifert +7 more
TL;DR: In this paper, the LiCu2O2 phase was synthesized using the solid-state method and characterized with X-ray powder diffraction technique and Rietveld analysis as well as inductively coupled plasma-optical emission spectrometry (ICP-OES).
Journal ArticleDOI
High-temperature structural phase transition in multiferroic LiCu_2O_2
Sergey A. Ivanov,Alexander A. Bush,K. E. Kamentsev,E. A. Tishchenko,M. Ottosson,Roland Mathieu,Per Nordblad +6 more
TL;DR: In this article, a first-order phase transition between orthorhombic and tetragonal phases was found to take place at 993 K and a peak is observed in the DTA curves, as well as jumps of the unit cell parameters and electrical resistivity.
Journal ArticleDOI
High-temperature structural phase transition in the LiCu2O2 multiferroic
K. E. Kamentsev,A. A. Bush,E. A. Tishchenko,Sergey A. Ivanov,Mikael Ottoson,Roland Mathieu,Per Nordblad +6 more
TL;DR: In this paper, the results of thermogravimetric, X-ray diffraction, and electrical studies of LiCu2O2 single crystals in the temperature range 300-1100 K were presented.
Journal ArticleDOI
Temperature evolution of structural and magnetic properties of stoichiometric LiCu2O2: Correlation of thermal expansion coefficient and magnetic order
TL;DR: In this paper, temperature-dependent crystallographic and magnetic studies on stoichiometric single crystals of LiCu2O2 are reported, where the temperature dependence of the lattice parameters was extracted from X-ray powder diffractograms collected on crushed single crystals, from 12 K to 295 K.
References
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Journal ArticleDOI
ac Conductivity of Scandium Oxide and a New Hopping Model for Conductivity
TL;DR: In this article, the authors measured the ac conductivity of scandium-oxide thin films in the audio-frequency range at temperatures between 4 and 295 K and found that the frequency-dependent component of the conductivity was found to obey an equation of the form ${\ensuremath{\sigma}}{1}(\ENSuremath{-}s} = A{\ensureMath{\omega}}^{s}, where S is the circular frequency and $s$ is a temperature-dependent quantity whose value is close to, but less than, unity