Back to Search
Start Over
Pressure effect and superconducting properties of lithium ternary borides
- Source :
- Physica C: Superconductivity and its Applications. :89-90
- Publication Year :
- 2007
- Publisher :
- Elsevier BV, 2007.
-
Abstract
- Li 2 Pd 3 B and Li 2 Pt 3 B show superconducting transition at the temperatures, 7.4 K and 2.6 K, respectively. These materials have the same cubic structure ( P 4 3 32) composed of distorted octahedrons, whose corners are occupied by Pd/Pt. This structure does not have mirror or inversion symmetry along any directions. It is a very interesting feature of those materials in relation to the symmetry of superconductivity. The samples were prepared by a two-stage arc-melting method. Their superconductivity is induced by Li addition. Controlling the Li stoichiometry is a key to synthesize high quality samples in the preparation process of arc-melting because Li is volatile at high temperatures. The specific heat measurements were carried out by heat-pulse relaxation and semi-adiabatic methods. Pressure effect was measured with a SQUID magnetometer using a low temperature hydrostatic micropressure cell at pressures up to around 1 GPa. The superconducting transition temperatures of both Li 2 Pd 3 B and Li 2 Pt 3 B decreased linearly with pressure. The pressure dependence, d T c /d P , were 0.091 and 0.090 K/GPa, respectively.
- Subjects :
- Superconductivity
Materials science
Magnetometer
Point reflection
Relaxation (NMR)
Analytical chemistry
Energy Engineering and Power Technology
chemistry.chemical_element
Condensed Matter Physics
Heat capacity
Electronic, Optical and Magnetic Materials
law.invention
chemistry
law
Lithium
Electrical and Electronic Engineering
Ternary operation
Stoichiometry
Subjects
Details
- ISSN :
- 09214534
- Database :
- OpenAIRE
- Journal :
- Physica C: Superconductivity and its Applications
- Accession number :
- edsair.doi...........28b58abc3d7f1afa6a5de17570204708
- Full Text :
- https://doi.org/10.1016/j.physc.2007.03.162