Superconductivity, weak itinerant ferromagnetism and electronic band structure of Y9Co7

作者：Kolodziejczyk A^*; Wiendlocha B; Zalecki R; Tobola J; Kaprzyk S

来源：Acta Physica Polonica, A, 2007, 111(4): 513-526.

The paper presents experimental results for the intermetallic compound Y9Co7 which is the first very weak itinerant ferromagnetic superconductor. The measurements of electrical resistivity, susceptibility, magnetization, specific heat, nuclear magnetic resonance, and other properties show the magnetic transition at T-C approximate to 4.5 K and the onset of superconductivity at about T-S approximate to 2.5 K, revealing the coexistence state within a temperature interval below T-S. A few of the results are shortly reviewed and discussed. We focus attention on our recent ultraviolet photoemission spectroscopy and their comparison with our band structure calculations. Interpretations are considered which take into account the characteristic structure of the compound and different possible types of magnetic ordering.

• 出版日期2007-4