کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1815390 | 1025663 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ferromagnetic resonance study of Pr0.5(Ca1âxSrx)0.5MnO3
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
We study the competing phases at the crossover from localized to itinerant electronic behavior in the system Pr0.5(Ca1âxSrx)0.5MnO3, with 0.10⩽x⩽0.75. The study was performed by Q-band (35 GHz) electron spin resonance (ESR) spectroscopy. At room temperature, the samples show a single Lorentzian line centered at g=2.020 (5). Instead, at low temperature all the samples present a ferromagnetic resonance line (FMR) that coexists with a paramagnetic (PM) absorption. For x=0.15, the FMR absorption is observed at TC=200 K. This transition shifts to higher temperatures when x increases and for x=0.75, TC=260 K. The ferromagnetic metallic (FM) phase changes from a minority phase, when x<0.2, to a majority one, for x>0.2. We fit the temperature dependence of the ESR spectra considering an FM phase with uniaxial anisotropy that coexists with a PM phase. We have found that the anisotropy field of the FM phase increases with x.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 398, Issue 2, 1 September 2007, Pages 434-437
Journal: Physica B: Condensed Matter - Volume 398, Issue 2, 1 September 2007, Pages 434-437
نویسندگان
E. Winkler, M.T. Causa, C.A. Ramos,