Superconductivity at 15 K in NdFeb>0.9b>Rhb>0.1b>AsO without F-doping

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• 作者：David Bé ; rardan ; Lidong Zhao ; Loreynne Pinsard-Gaudart ; Nita Dragoe
• 关键词：Oxypnictide ; Thermopower ; Electrical resistivity ; Magnetic susceptibility
• 刊名：Physica C
• 出版年：2010
• 出版时间：15 January 2010
• 年：2010
• 卷：470
• 期：2
• 页码：165-167
• 全文大小：228 K

文摘

We present results of transport and magnetic properties measurements performed on polycrystalline NdFeb>0.9b>Rhb>0.1b>AsO. Despite the large size difference between Fe and Rh elements, this compound undergoes a superconducting transition with Tb>cb>  15 K. We have compared the transport properties of this Rh-doped oxypnictide with that of optimally doped NdFeAsOb>0.88b>Fb>0.12b>. Contrary to this latter compound, a strong upturn of the normal-state resistivity occurs above Tb>cb>, and no peak of the thermopower has been observed.