کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8155128 | 1524814 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Abnormal magnetization behaviors in Sm-Ni-Fe-Cu alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Abnormal magnetization behaviors in Sm-Ni-Fe-Cu alloys Abnormal magnetization behaviors in Sm-Ni-Fe-Cu alloys](/preview/png/8155128.png)
چکیده انگلیسی
The magnetization behaviors in Sm-Ni-Fe-Cu alloys at low temperatures have been investigated. It was found that the hysteresis loops show wasp-waisted character at low temperatures, which has been proved to be related to the existence of multi-phases, the Fe/Ni soft magnetic phases and the CaCu5-type hard magnetic phase. A smooth-jump behavior of the magnetization is observed at T>5Â K, whereas a step-like magnetization process appears at T<5Â K. The CaCu5-type phase is responsible for such abnormal magnetization behavior. The magnetic moment reversal model with thermal activation is used to explain the relation of the critical magnetic field (Hcm) to the temperature (T>5Â K). The reversal of the moment direction has to cross over an energy barrier of about 6.6Ã10â15Â erg. The step-like jumps of the magnetization below 5Â K is proposed to be resulted from a sharp increase of the sample temperature under the heat released by the irreversible domain wall motion.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 407, 1 June 2016, Pages 224-229
Journal: Journal of Magnetism and Magnetic Materials - Volume 407, 1 June 2016, Pages 224-229
نویسندگان
W.Y. Yang, Y.F. Zhang, H. Zhao, G.F. Chen, Y. Zhang, H.L. Du, S.Q. Liu, C.S. Wang, J.Z. Han, Y.C. Yang, J.B. Yang,