کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1802872 | 1024606 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hyperfine interactions and band structures of LaFe13âxSix intermetallic compounds with large magnetic entropy changes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
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چکیده انگلیسی
Magnetic properties and hyperfine interactions of LaFe13âxSix intermetallic compounds with large magnetic entropy changes were investigated by means of Mössbauer spectroscopy, band structure calculation and magnetization measurements. It was found that the 57Fe magnetic hyperfine field at FeI (8b) site is larger than that at the FeII (96i) site, whereas the magnetic moment of Fe atoms at the FeI site is smaller than that of Fe atoms at the FeII site. The temperature dependence of the average 57Fe magnetic hyperfine field was found to deviate from the mean field model close to TC, implying that the first-order magnetic phase transition is predominant in the sample of LaFe11.7Si1.3, and consequently results in a large magnetic entropy change. Furthermore, the effect of Si substitution for Fe on hyperfine parameters was investigated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 303, Issue 1, August 2006, Pages 84-91
Journal: Journal of Magnetism and Magnetic Materials - Volume 303, Issue 1, August 2006, Pages 84-91
نویسندگان
Guang-jun Wang, Fang Wang, Nai-li Di, Bao-gen Shen, Zhao-hua Cheng,