کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7996198 | 1516207 | 2016 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pnictide-height dependent ferromagnetism in CuFeAs and CuFeSb
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Pnictide-height dependent ferromagnetism in CuFeAs and CuFeSb Pnictide-height dependent ferromagnetism in CuFeAs and CuFeSb](/preview/png/7996198.png)
چکیده انگلیسی
Electronic structures and magnetism properties of CuFeAs and CuFeSb are investigated by using first-principles calculations. We found that CuFeAs and CuFeSb share similar electronic structures and magnetic properties. Unlike the antiferromagnetic isostructure LiFeAs, the ground state of both compounds is ferromagnetic state driven by the Stoner ferromagnetic instability. Their ground state is very sensitive to the height of anion (As or Sb), translating from the ferromagnetic state to the stripe antiferromagnetic ordering when the anion height is smaller than a critical value. Such magnetic phase transition can be understood by the J1âJ2 Heisenberg model. Reducing the anion height will decrease the nearest-neighbor interaction J1 but increase the next-nearest-neighbor interaction J2. The competing between the anion height dependent antiferromagnetic superexchange mediated by As(Sb) and the ferromagnetic direct exchange between Fe results the variations of magnetic structure with anion height.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 686, 25 November 2016, Pages 38-42
Journal: Journal of Alloys and Compounds - Volume 686, 25 November 2016, Pages 38-42
نویسندگان
Guangtao Wang, Xianbiao Shi, Dongyang Wang,