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Local structure of Co and Ni in decagonal AlNiCo investigated by polarized EXAFS |
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| Authors: | O Zaharko C Meneghini A Cervellino E Fischer |
| Institution: | (1) ETH Zurich & PSI Villigen, Laboratory for Neutron Scattering, Switzerland, CH;(2) Istituto Nazionale di Fisica della Materia (INFM), c/o ESRF GILDA CRG BP 220 38043 Grenoble, France, FR;(3) ETH Zurich, Laboratory of Crystallography, Switzerland, CH;(4) ETH Zurich, Institute of Applied Physics, Switzerland, CH |
| Abstract: | The local structure of cobalt and nickel in single crystals of decagonal quasicrystals with composition Al71.5Ni15.5Co13 and Al75Ni14.5Co10.5 have been studied by polarized EXAFS. Significant differences between the Ni and Co local environments have been detected. The effective absence of the 4 ? periodicity along the decagonal axis in these QCs is confirmed and indications about its reasons are presented. Received 26 July 2000 and Received in final form 20 October 2000 |
| Keywords: | PACS 61 44 Br Quasicrystals – 61 10 Ht X-ray absorption spectroscopy: EXAFS NEXAFS XANES etc |
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