کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5369691 1388447 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Epitaxial LSMO films grown on MgO single crystalline substrates
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Epitaxial LSMO films grown on MgO single crystalline substrates
چکیده انگلیسی

The manganite La0.67Sr0.33MnO3 (LSMO) layers are deposited on single crystal MgO(0 0 1) substrates using a magnetron dc sputtering. The crystalline perfection of the layers, both the as-prepared and the annealed, are characterized by X-ray diffraction technique, rocking curve measurements, Rutherford backscattering spectroscopy (RBS) and transmission electron microscopy (TEM). TEM analyses give evidence of the epitaxial growth of the annealed LSMO with a nanocrystalline surface layer. The temperature dependence of resistance in the 77-340 K range is measured by a standard four-probe technique. While the as-prepared film does not show any transition from paramagnetic to ferromagnetic state, the film annealed in oxygen shows steep R(T) dependence with a peak at 330 K and maximal slope (dR/dT) at 290 K where the maximal sensitivity is 3% K−1.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 253, Issue 18, 15 July 2007, Pages 7599-7603
نویسندگان
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