کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1532174 | 1512025 | 2006 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Ab initio study of the electronic structure of Sr2FeMoO6 double perovskites presenting oxygen vacancies or/and antisite imperfections Ab initio study of the electronic structure of Sr2FeMoO6 double perovskites presenting oxygen vacancies or/and antisite imperfections](/preview/png/1532174.png)
Electronic band structure calculations using the ab initio full potential linearized augmented plane wave (FLAPW) method are reported for Sr2FeMoO6 (SFMO) double perovskites presenting oxygen vacancies or/and antisite defects. We show that the total magnetic moment is much more reduced for structures with oxygen vacancies (approximately 2μB2μB per vacancy) than for structures without. We investigate also the stability of an antiparallel (AP) magnetic moment on Fe antisites and we show that these solutions are highly unstable relative to the parallel (P) solution, even if the presence of O vacancies reduces the difference between P and AP solutions. Finally, we exhibit that the half-metallic character is preserved for SFMO containing only nearly isolated oxygen vacancies.
Journal: Materials Science and Engineering: B - Volume 126, Issues 2–3, 25 January 2006, Pages 133–138