Valence spin ordering of the superconducting multilayer below extraordinarily high temperatures

✍ Scribed by Katsuyuki Tsukui; Masanori Yata; Iwao Ohdomari; Toshiaki Osaka; Nobuaki Yagi; Hiroyuki Tsukui

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 398 KB
• Volume: 162-163
• Category: Article
• ISSN: 0169-4332
• DOI: 10.1016/s0169-4332(00)00198-7

✦ Synopsis

The electric resistivity was measured in the mesoscopic system of the NbrCu superconducting multilayer. In case the inter-layer spin exchange correlation was maximal by a two-dimensional crossover effect, the resistivity increased by 0.8% at 100 K. Anomaly was observed only in the mesoscopic system with the temperature extraordinarily higher than the transition temperature. In this report, the phenomena is discussed in terms of the spin arrangement of the valence electron and it is concluded that the anomalous resistivity depends upon the spin arrangement of the valence electron. Furthermore, a hypothesis that the spin arrangement should be the precursor state of the superconducting phase transition is proposed by introducing the concept of ''the thermal stabilization of the Cooper pair''.