6533b7d3fe1ef96bd1261201
RESEARCH PRODUCT
A facile semi-open method for synthesis of non-centrosymmetric superconducting Li2(Pd,Pt)3B bulks and thin films
Petre BadicaGerhard Jakobsubject
SuperconductivityMagnetizationMaterials scienceSlow coolingSuperconducting thin filmsAnalytical chemistryHeat treatedEnergy Engineering and Power TechnologySemi openElectrical and Electronic EngineeringThin filmCondensed Matter PhysicsElectronic Optical and Magnetic Materialsdescription
Abstract Non-centrosymmetric superconductor Li 2 (Pd 1− x Pt x ) 3 B, x = 0–1 was synthesized from mixtures of the elements. A simple semi-open method is proposed using endings-pressed stainless steel tubes placed in a high-vacuum furnace. Heating regime employed a short-time overheating at 900 °C and a slow cooling step between T s and 550 °C within 3 h. To adequately compensate Li-losses and attain maximum critical temperature, the optimum T s and starting Li-content were found to change from 720 to 740 °C and from Li 2.4 to Li 2.6 , respectively, when x was changing from 0 to 1. It was shown that placing Li separately in the tube also produces superconducting samples, Li being supplied to the (Pd,Pt)-B mixture through the vapour transport. This result enables the possibility of thin films growth using a (Pd,Pt)-B precursor film heat treated in a Li-vapour atmosphere. Preliminary results on thin films growth are introduced.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-12-01 | Physica C: Superconductivity and its Applications |