Superconductivity in Fluorine-Arsenide Sr1-xNdxFeAsF

Ryosuke Suganuma; Tadataka Watanabe; Kouichi Takase; Yoshiki Takano

doi:10.4028/www.scientific.net/SSP.170.87

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Superconductivity in Fluorine-Arsenide Sr_1-xNd_xFeAsF

Abstract:

We have successfully prepared the new family of fluoride-arsenide Sr1-xNdxFeAsF (0 ≤ x ≤ 0.5), and investigated the electrical and magnetic properties. Sr1-xNdxFeAsF with x = 0.4 and 0.5 show superconductivity, and their superconducting transition temperatures are 32 and 49 K, respectively. The superconducting volume fractions of Sr0.6Nd0.4FeAsF and Sr0.5Nd0.5FeAsF are ~11 and ~ 17 %, respectively. On the other hand, the sample of Sr1-xNdxFeAsF (0 ≤ x ≤ 0.35) is not superconducting but shows a metallic conductivity. All compounds show a weak ferromagnetism with the Curie temperature of above room temperature. The origin of the ferromagnetism may be due to the tiny Fe impurity.

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Solid State Phenomena (Volume 170)

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87-91

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.170.87

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Online since:

April 2011

Authors:

Ryosuke Suganuma, Tadataka Watanabe, Kouichi Takase, Yoshiki Takano

Keywords:

Ferromagnetism, Fluorine-Arsenide, Spin Density Wave, Superconductivity

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