High-temperature structural phase transition in the LiCu{sub 2}O{sub 2} multiferroic

Journal Article · Thu Aug 15 00:00:00 EDT 2013 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776113100026· OSTI ID:22210509

Kamentsev, K. E.; Tishchenko, E. A. ^[1]; Ivanov, S. A. ^[2]; Ottoson, M. ^[3]; Mathieu, R.; Nordblad, P. ^[4]

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1. Russian Academy of Sciences, Kapitza Institute for Physical Problems (Russian Federation)
2. Karpov Research Institute of Physical Chemistry (Russian Federation)
3. Uppsala University, Department of Chemistry (Sweden)
4. Uppsala University, Department of Engineering Sciences (Sweden)

The results of thermogravimetric, X-ray diffraction, and electrical studies of LiCu{sub 2}O{sub 2} single crystals in the temperature range 300-1100 K are presented. A reversible first-order phase transition between the orthorhombic and tetragonal phases is found to occur in these single crystals at T = 993 K. A pronounced peak on a differential thermal analysis curve and jumps in the unit cell parameters and the electrical resistivity are detected at the phase-transition temperature. The data on the crystal structure of LiCu{sub 2}O{sub 2} and the phase transition-induced change in the entropy determined in this work are used to conclude that the revealed phase transition is caused by the ordering-disordering of Li{sup +} and Cu{sup 2+} cations in their structural positions.

• OSTI ID: 22210509
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 117, Issue 2; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CATIONS
COPPER IONS
DIFFERENTIAL THERMAL ANALYSIS
ELECTRIC CONDUCTIVITY
ENTROPY
LITHIUM IONS
MONOCRYSTALS
ORTHORHOMBIC LATTICES
PHASE TRANSFORMATIONS
TEMPERATURE RANGE 0400-1000 K
THERMAL GRAVIMETRIC ANALYSIS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION