Thermal conductivity of single crystal La1.85Sr0.15CuO4−y

✍ Scribed by Katsunori Mori; Yoshiaki Ogiso; Yosikazu Isikawa; Kiyoo Sato; Michiaki Matsukawa; Koshichi Noto; Takako Sasaki; Norio Kobayashi

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 148 KB
• Volume: 185-189
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(91)91929-x

✦ Synopsis

We have measured the temperature dependence of the thermal conductivity ~b in direction parallel to the copper-oxygen planes for a single crystal of LaLssSr0.1sCuO4-~ in the temperature range from I.gK to 50K. tcab shows the enhancement at the superconducting transition temperature T~. Below 15K, tzab (T) does not show T 2-dependence but T-linear dependence. We have also measured the magnetic field dependence of t~ab at T=4.50K in direction parallel to the heat flow up to 2kOe. tz~b begins to drop rapidly at Her and goes to constant. The decrease of t<ab (H) is probably due to the reduction of the lattice conduction because phonons are scattered within the normal regions.