کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1526884 | 1511852 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spin-glass-like ordering in É-Fe3âxNixN (0.1 â¤Â x â¤Â 0.8) nanoparticles
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Spin-glass-like ordering in É-Fe3âxNixN (0.1 â¤Â x â¤Â 0.8) nanoparticles Spin-glass-like ordering in É-Fe3âxNixN (0.1 â¤Â x â¤Â 0.8) nanoparticles](/preview/png/1526884.png)
چکیده انگلیسی
É-Fe3âxNixN (0.1 â¤Â x â¤Â 0.8) nanoparticles are investigated for the magnetic interaction effects at low temperatures. The reduction of saturation magnetization (Ïs) values is attributed to spin pairing effects and surface spin canting. In ZFC and FC magnetization curves, the surface spin-glass layer (Tf1) and the reentrant spin-glass behavior (Tf2) are evidenced below 27 and 22 K respectively. The surface spin-glass phase is described by the random-field model of exchange anisotropy. Based on this theory, a surface spin-glass layer about 8 nm thick is determined. The reentrant spin-glass behavior occurs due to the disorder created by Ni substitution and is observed for 0.2 â¤Â x â¤Â 0.4. The spin-glass-like ordering in the representative É-Fe2.6Ni0.4N system is verified using spin relaxation dynamics and ac susceptibility measurements. The dynamic scaling analysis, based on imaginary part of the ac susceptibility data, gives the parameters Ï0 = 10â8 s, Tc = 15.3 K, and zν = 4.5 and hence confirm the spin-glass-like ordering in É-Fe3âxNixN (0.1 â¤Â x â¤Â 0.8) nanoparticles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 108, Issues 2â3, 15 April 2008, Pages 201-207
Journal: Materials Chemistry and Physics - Volume 108, Issues 2â3, 15 April 2008, Pages 201-207
نویسندگان
N.S. Gajbhiye, Sayan Bhattacharyya,