کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1668675 | 1008873 | 2011 | 5 صفحه PDF | دانلود رایگان |

Basic properties, such as the phase relationship, crystal structure, and energy gap Eg, have been investigated in Sr-rich Sr1 − xBaxSi2. Sr1 − xBaxSi2 (0 ≤ x ≤ 1.0) has two phases: one with the SrSi2-type structure and another with the BaSi2-type structure. The SrSi2 phase exists at x ranging from 0 to 0.13, and the BaSi2 phase exists at x ranging from 0.24 to 1.0. The volume increases with x in both the SrSi2 and BaSi2 phases. A volume jump of 13.7% appears at the structural phase transition from the SrSi2 phase to the BaSi2 phase. Eg increases with x in SrSi2-phase Sr1 − xBaxSi2 but Eg decreases with x in the BaSi2-phase Sr1 − xBaxSi2. In Sr-rich BaSi2-phase Sr1 − xBaxSi2, Ba atoms at a specific crystallographic site, the A1 site, are preferentially substituted by Sr atoms, as well as in Ba-rich BaSi2-phase Sr1 − xBaxSi2.
Journal: Thin Solid Films - Volume 519, Issue 24, 3 October 2011, Pages 8496–8500