کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9801883 | 1515733 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Positive magnetoresistance feature in ultrathin La0.67Ca0.33MnO3 films
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Positive magnetoresistance feature in ultrathin La0.67Ca0.33MnO3 films Positive magnetoresistance feature in ultrathin La0.67Ca0.33MnO3 films](/preview/png/9801883.png)
چکیده انگلیسی
The ultrathin epitaxial La0.67Ca0.33MnO3 (LCMO) films with thickness from 8 to 50 nm on (001) SrTiO3 (STO) substrates were prepared and investigated, and the unique MR effects were distinctly observed. The positive magnetoresistance (MR) effects were observed in the high temperature region for all the present ultrathin films. The films with thickness in the range from 17 to 30 nm not only show the positive MR effect at high temperature (>TMI), but also in the low temperature region (â¤96 K for 17 nm, â¤108 K for 30 nm). It is suggested that the positive MR effect occurred at low temperature could be attributed to the scattering of the domain wall on charge carriers, while the positive MR effect occurred at temperature higher than TMI is attributed to the transport dominated by the magnetic polarons which formed due to the trap of charge carriers with spin in local distorted lattice in such highly strained ultrathin LCMO films.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 136, Issues 9â10, December 2005, Pages 528-532
Journal: Solid State Communications - Volume 136, Issues 9â10, December 2005, Pages 528-532
نویسندگان
J.P. Zhong, S.B. Yang, J. Yuan, B. Xu, L.X. Cao, X.G. Qiu, B.R. Zhao,