کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9834152 1524907 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Resonant soft X-ray scattering-a new probe of charge, spin and orbital ordering in the manganites
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Resonant soft X-ray scattering-a new probe of charge, spin and orbital ordering in the manganites
چکیده انگلیسی
Soft X-ray resonant diffraction is a new technique pioneered by our group. We have published examples of the huge resonant enhancements of charge and magnetic scattering that can be obtained at the L-edges of 3d transition metal oxides. In this paper we will also show how resonant soft X-ray scattering enables direct observation of orbital ordering. We have studied the low temperature phase of La0.5Sr1.5MnO4 that displays charge, spin and orbital ordering. We have employed resonant soft X-ray scattering at the manganese L edges which provide a direct measurement of the orbital ordering. Energy scans at constant wavevector have been compared to theoretical predictions and show that at all temperatures there are two separate contributions to the observed scattering, direct Goodenough orbital ordering and strong cooperative Jahn-Teller distortions of the Mn3+ ions. Finally, we will show how that the spin and orbital degrees of freedom are strongly correlated in these materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volumes 290–291, Part 2, April 2005, Pages 891-897
نویسندگان
, , , , , ,