کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1816799 | 1525271 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnetic clusters in superconducting lightly doped YBa2Cu3O6+x
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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: Magnetic clusters in superconducting lightly doped YBa2Cu3O6+x Magnetic clusters in superconducting lightly doped YBa2Cu3O6+x](/preview/png/1816799.png)
چکیده انگلیسی
We report μSR experiments on two lightly doped superconducting YBa2Cu3O6+x samples (0.39⩽x⩽0.41), performed with the initial muon spin polarization rotated by 47â from the applied field direction. At low temperature, the muon asymmetry of both samples exhibits a dominant component with very large depolarization rates, due to the presence of frozen magnetic clusters. A two-component model, accounting for muon sites close to the clusters and far from them, respectively, is presented. The model provides a prediction for the time evolution of both the longitudinal and transverse projections of the muon polarization, and yields a good simultaneous fit to the data of each sample at all the applied fields. The best-fit parameters demonstrate that the static internal fields from the magnetic clusters are disordered, in agreement with the absence of long-range magnetic Bragg peaks in neutron diffraction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volumes 374â375, 31 March 2006, Pages 221-224
Journal: Physica B: Condensed Matter - Volumes 374â375, 31 March 2006, Pages 221-224
نویسندگان
G. Allodi, S. Sanna, G. Concas, R. Caciuffo, R. De Renzi,