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High-pressure synthesis, electrical and magnetic properties of new filled skutterudites LnOs{sub 4}P{sub 12} (Ln = Eu, Gd, Tb, Dy, Ho, Y)

New filled skutteudites LnOs{sub 4}P{sub 12} (Ln: Eu, Gd, Tb, Dy, Ho and Y) have been prepared at high temperatures and at high pressures. X-ray diffraction of these compounds is studied at room temperature. The relationship between lattice constants and atomic numbers of lanthanide (including Y) is...

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Bibliographic Details
Published in:Materials research bulletin 2004-02, Vol.39 (2)
Main Authors: Kihou, K., Shirotani, I., Shimaya, Y., Sekine, C., Yagi, T
Format: Article
Language:English
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Summary:New filled skutteudites LnOs{sub 4}P{sub 12} (Ln: Eu, Gd, Tb, Dy, Ho and Y) have been prepared at high temperatures and at high pressures. X-ray diffraction of these compounds is studied at room temperature. The relationship between lattice constants and atomic numbers of lanthanide (including Y) is obtained for LnOs{sub 4}P{sub 12} (Ln: lanthanide). Electrical and magnetic properties of the new filled skutterudites with heavier lanthanide have been investigated at low temperatures. EuOs{sub 4}P{sub 12} and GdOs{sub 4}P{sub 12} show ferromagnetic transitions at around 15 and 22 K, respectively. The valence states of both compounds are +2 for the Eu compound and +3 for the Gd compound. DyOs{sub 4}P{sub 12} does not show the magnetic transition down to 2 K. However, a small electrical anomaly is found at around 10 K. YOs{sub 4}P{sub 12} exhibits a superconducting transition at around 3 K. This compound is a new superconductor. Electrical and magnetic anomalies of new filled skutterudites with heavier lanthanide LnOs{sub 4}P{sub 12} (Ln: Eu, Gd, Dy and Y) are discussed. We have also found the electrical anomaly based on the magnetic transition at around 22 K for GdFe{sub 4}P{sub 12}.
ISSN:0025-5408
1873-4227
DOI:10.1016/j.materresbull.2003.07.015