کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1785493 | 1023382 | 2016 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of vortex-vortex interactions on the critical current density of single-crystalline MgB2 thin films
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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: Effect of vortex-vortex interactions on the critical current density of single-crystalline MgB2 thin films Effect of vortex-vortex interactions on the critical current density of single-crystalline MgB2 thin films](/preview/png/1785493.png)
چکیده انگلیسی
We have investigated the influence of inter-vortex interactions on the critical current density (Jc) and flux pinning properties of single-crystalline MgB2 thin films grown using a hybrid physical-chemical vapor deposition system. Magnetic field dependences of Jc were measured over a 5-35 K range of temperatures for fields applied parallel and perpendicular to the ab-plane of the film's surface. Two regions along the Jc(H) curve, the low-field plateau region and the high-field slope region, which are respectively known as the single-vortex and collective pinning regimes, are clearly distinguishable. A ratio a0/λ between the inter-vortex spacing a0 and the penetration depth λ was calculated at each temperature, to investigate the effect of vortex-vortex interactions on the Jc(H). We found that the a0/λ dependences of the normalized Jc(H,T) data tend to fall onto one curve irrespective of the temperature, if only we use a certain average value of λ. Furthermore, the flux pinning mechanism shows a crossover from δTc-pinning to δl-pinning with increasing magnetic fields, indicating the coexistence of different pinning mechanisms in MgB2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 16, Issue 9, September 2016, Pages 1046-1051
Journal: Current Applied Physics - Volume 16, Issue 9, September 2016, Pages 1046-1051
نویسندگان
Duong Pham, Soon-Gil Jung, K.J. Song, M. Ranot, J.H. Lee, N.H. Lee, W.N. Kang,