Low-temperature crystal structure, specific heat, and dielectric properties of lithium tetraborate Li{sub 2}B{sub 4}O{sub 7}

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3504244· OSTI ID:21476604

Senyshyn, A; Fuess, H ^[1]; Schwarz, B; Ehrenberg, H ^[2]; Lorenz, T ^[3]; Adamiv, V T; Burak, Ya V ^[4]; Banys, J; Grigalaitis, R ^[5]; Vasylechko, L ^[6]

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1. Institute for Material Science, Darmstadt University of Technology, Petersenstrasse 23, D-64287 Darmstadt (Germany)
2. Leibniz-Institute IFW Dresden, Institute for Complex Materials, P.O. Box 270116, D-01171 Dresden (Germany)
3. II. Physikalisches Institut, Universitaet zu Koeln, Zuelpicher Strasse 77, D-50937 Koeln (Germany)
4. Institute of Physical Optics, 23 Dragomanov St., 79005 Lviv (Ukraine)
5. Physics Faculty, Vilnius University, Sauletekio 9/3, 10222 Vilnius (Lithuania)
6. Lviv Polytechnic National University, 12 Bandera St., 79013 Lviv (Ukraine)

Coherent neutron powder diffraction experiments were carried out together with specific heat, dilatometry, and dielectric spectroscopy studies on Li{sub 2}B{sub 4}O{sub 7} enriched with {sup 11}B isotope to 99.3% at low temperatures. Neither traces of phase transformations nor discontinuous changes in physical properties were observed. Negative thermal expansion, anomalous thermal behavior of selected interatomic distances/angles, isotropic displacement parameters on specific sites as well as dielectric constant were discussed in terms of dynamic lithium disorder.

• OSTI ID: 21476604
• Journal Information: Journal of Applied Physics, Vol. 108, Issue 9; Other Information: DOI: 10.1063/1.3504244; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BORATES
BORON 11
CRYSTAL DEFECTS
DIELECTRIC MATERIALS
DILATOMETRY
INTERATOMIC DISTANCES
LITHIUM COMPOUNDS
NEUTRON DIFFRACTION
PERMITTIVITY
PHASE TRANSFORMATIONS
SPECIFIC HEAT
TEMPERATURE DEPENDENCE
THERMAL EXPANSION
ALKALI METAL COMPOUNDS
BORON COMPOUNDS
BORON ISOTOPES
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIELECTRIC PROPERTIES
DIFFRACTION
DISTANCE
ELECTRICAL PROPERTIES
EXPANSION
ISOTOPES
LIGHT NUCLEI
MATERIALS
NUCLEI
ODD-EVEN NUCLEI
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCATTERING
STABLE ISOTOPES
THERMAL ANALYSIS
THERMODYNAMIC PROPERTIES