Abstract
Li2Pd3B and Li2Pt3B show superconducting transition at the temperatures, 7.4 K and 2.6 K, respectively. These materials have the same cubic structure (P4332) 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 Li2Pd3B and Li2Pt3B decreased linearly with pressure. The pressure dependence, dTc/dP, were 0.091 and 0.090 K/GPa, respectively.
Original language | English |
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Pages (from-to) | 89-90 |
Number of pages | 2 |
Journal | Physica C: Superconductivity and its applications |
Volume | 460-462 I |
Issue number | SPEC. ISS. |
DOIs | |
Publication status | Published - Sep 1 2007 |
Externally published | Yes |
Keywords
- Heat capacity
- LiPdB
- LiPtB
- Pressure effect
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering