Crystal structure, 139La NMR and transport properties of the As-based filled skutterudites LaOs4As12 and PrOs4As12
| Autor: | W. M. Yuhasz, O.J. Żogał, M. B. Maple, Zygmunt Henkie, S. Paluch, Ryszard Wawryk, T. A. Sayles, Adam Pietraszko, Tatsuya Yanagisawa, Nicholas P. Butch, Pei-Chun Ho, Tomasz Cichorek |
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| Rok vydání: | 2008 |
| Předmět: |
Condensed matter physics
Chemistry Mechanical Engineering Metals and Alloys Spin–lattice relaxation Analytical chemistry Space group Knight shift Crystal structure Atmospheric temperature range Magnetic susceptibility Mechanics of Materials Seebeck coefficient Thermoelectric effect Materials Chemistry |
| Zdroj: | Journal of Alloys and Compounds. 451:454-456 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2007.04.094 |
| Popis: | We have grown single crystals of LaOs 4 As 12 and PrOs 4 As 12 , which crystallize in the LaFe 4 P 12 -type structure (Im3 space group) with the lattice parameters of 8.542(1) A and 8.520(1) A, respectively. From a narrow 139 La NMR line, we estimated an appreciable Knight shift ( 139 K) and a relatively long spin-lattice-relaxation time in the non-4f electron system LaOs 4 As 12 . Surprisingly, while 139 K vary non-monotonically with temperature, the magnetic susceptibility increases upon cooling over the whole temperature range. Interestingly, the high-temperature dependence of the thermoelectric power of LaOs 4 As 12 is remarkably similar to that one of PrOs 4 As 12 . |
| Databáze: | OpenAIRE |
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