کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1803216 | 1024612 | 2009 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spontaneous and field-induced magnetic transitions in YBaCo2O5.5
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A detailed study of magnetic properties of cobaltite YBaCo2O5.5 has been performed in high (up to 35Â T) magnetic fields and under hydrostatic pressure up to 0.8Â GPa. The temperatures of paramagnet-ferromagnet (PM-FM) and ferromagnet-antiferromagnet (FM-AF) phase transitions and their pressure derivatives have been determined. It has been revealed that in the compound with yttrium, in contrast to those with magnetic rare earth atoms, the AF-FM field-induced magnetic phase transition is accompanied by a considerable field hysteresis below 240Â K, and the magnetic field of 35Â T is not sufficient to complete this transition at low temperatures. The hysteresis value depends on the magnetic field sweep rate, which considered as an evidence of magnetic viscosity that is especially strong in the region of coexistence of the FM and AF phases. High values of susceptibility for the field-induced FM phase show that Co spin state in these compounds changes in strong magnetic field.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 321, Issue 5, March 2009, Pages 429-437
Journal: Journal of Magnetism and Magnetic Materials - Volume 321, Issue 5, March 2009, Pages 429-437
نویسندگان
V. Bobrovskii, V. Kazantsev, A. Mirmelstein, N. Mushnikov, N. Proskurnina, V. Voronin, E. Pomjakushina, K. Conder, A. Podlesnyak,