کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1800785 1024545 2012 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spin crossovers in Mott–Hubbard insulators at high pressures
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Spin crossovers in Mott–Hubbard insulators at high pressures
چکیده انگلیسی

The high-pressure induced phase transitions initiated by electronic transition in 3d ions from the high-spin (HS) to the low-spin (LS) state (HS-LS spin-crossover) are considered. Behavior of the system with d6 electronic configuration is investigated in the ground state of zero temperature and critical pressure Pc. Magnetic properties of the Mott–Hubbard insulator (Mg1−xFex)O are studied in the vicinity of the quantum critical point (T=0, Pc). At the critical pressure of spin crossover Pc, the spin gap energy εS between HS and LS states is zero. The quantum spins fluctuations HS⇔LS do not require any energy, and the antiferromagnetism is destroyed in the quantum critical point by the first order transition.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 324, Issue 21, October 2012, Pages 3538–3541
نویسندگان
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