Search for New Superconductors by Soft-Chemical Techniques

Masatsune Kato; Tomohisa Takamatsu; Hotaka Yagyu; Takashi Noji; Yoji Koike

doi:10.4028/www.scientific.net/KEM.508.203

Paper Titles

Growth of b-Axis-Oriented BaTi₂O₅ Nanopillars by Laser Chemical Vapor Deposition
p.185

Deposition of BaTi₂O₅ Films on Si Substrates by Using MgO Buffers
p.189

Effect of Nitridation on Indium-Composition of InGaN Films
p.193

Ba₂TiO₄ and Ba₄Ti₁₃O₃₀ Thick Films Prepared by Laser Chemical Vapor Deposition and their Microstructure
p.199

Search for New Superconductors by Soft-Chemical Techniques
p.203

Preparation of c-Axis-Oriented Y₂Ba₄Cu₇O₁₅_-δ Films by Laser CVD with Ultrasonically Nebulized Precursor
p.207

Effect of Sb₂O₃ Doping Ratio on Electrical and Optical Properties of ATO Films by Pulsed Laser Deposition
p.211

Comprehensive Approach for the Construction of New Material for Electronic Multipliers
p.215

Growth of Heavily Indium Doped Si Crystals by Co-Doping of Neutral Impurity Carbon or Germanium
p.220

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Search for New Superconductors by Soft-Chemical Techniques

Abstract:

Our Recent Works on the Search for New Superconductors Using Soft-Chemical Techniques Are Reviewed. We Have Found New Mg-Intercalated Superconductors of Mg_xZrNCl and Mg_xHFNCl with Tc ~ 13 K and 25 K, Respectively. Moreover, we Have Succeeded in Preparing Bulk Samples of Hole-Doped (La,Ca)₂CuO₄ with the Nd₂CuO₄-Type, Namely, the so-Called T’-Type Structure by Reduction of (La,Ca)₂CuO₄ with the K₂NiF₄-Type, Namely, the so-Called T-Type Structure Using CaH₂ at a Temperature as Low as 300°C and Subsequent Oxidation. This Result Is in Contrast with the Synthesis of (La,Ca)₂CuO₄ with the K₂NiF₄-Type Structure by the Conventional Solid-State Reaction Method at a Temperature as High as ~1000°C.