کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1816744 1525271 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
19F NMR and longitudinal field μSR studies of the spin dynamics in LiY0.998Ho0.002F4
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
19F NMR and longitudinal field μSR studies of the spin dynamics in LiY0.998Ho0.002F4
چکیده انگلیسی

It has recently been demonstrated that quantum tunneling of magnetization occurs between the low-lying electro-nuclear energy levels of Ho3+ ions doped into LiYF4. Here, we report 19F NMR and longitudinal field μSR measurements on single crystal LiY0.998Ho0.002F4. We observe that the 19F spin-lattice relaxation rate 1/T1 is controlled by the fluctuating field of the Ho ion and, consequently, 1/T1 increases sharply at resonant magnetic field values where the energy levels are predicted to have level crossings/avoided level crossings, in agreement with the magnetization measurements. Complementary to these ongoing NMR studies we have undertaken longitudinal field μSR measurements. At low magnetic fields, the muon depolarization rate is dominated by strong depolarization due to the formation of F–muon–F bonds, while at higher fields the longitudinal field dominates, and any enhancement of the depolarization rate due to the energy level crossings is very weak.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volumes 374–375, 31 March 2006, Pages 9–12
نویسندگان
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