نتایج جستجو برای: caalsi
تعداد نتایج: 12 فیلتر نتایج به سال:
Superconductivity in the C32 compounds CaAlSi and SrAlSi is investigated by heat capacity measurements as well as high-pressure ac-susceptibility experiments. The heat capacity in the superconducting state is well explained by the BCS theory for weak ~SrAlSi! and enhanced coupling strength ~CaAlSi!. The magnitudes of the superconducting gaps are estimated as 2.7 meV ~CaAlSi! and 1.4 meV ~SrAlSi...
We report on the structural and microscopic superconducting properties of ${\mathrm{Ca}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}\mathrm{AlSi}$ solid solution. Specifically, we have realized continuous solution, which for all members, other than $x=0$ (CaAlSi), crystallizes in ${\mathrm{AlB}}_{2}$-type structure. For CaAlSi, present an improved model where Al/Si layers are buckled, leading to a 6-fo...
We report on the structural and microscopic superconducting properties of ${\mathrm{Ca}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}\mathrm{AlSi}$ solid solution. Specifically, we have realized continuous solution, which for all members, other than $x=0$ (CaAlSi), crystallizes in ${\mathrm{AlB}}_{2}$-type structure. For CaAlSi, present an improved model where Al/Si layers are buckled, leading to a 6-fo...
در این مطالعه، به بررسی بعضی مشخصات و خواص سه گونه از ماده ی هگزاگونال caalsi پرداخته شده است. محاسبات بر مبنای نظریه ی تابعی چگالی (dft) و با استفاده از تقریب gga صورت گرفته اند. این مطالعه ابتدا به معرفی نظریه ی تابعی چگالی می پردازد. سپس به معرفی برخی مشخصات و خواص سه گونه ی بلور caalsi، از قبیل مشخصات ساختاری می پردازد. در مرحله ی بعد محاسبات شروع می شود، به این ترتیب که با استفاده از کد wi...
The flux-line lattice in CaAlSi has been studied by small-angle neutron scattering. A well-defined hexagonal flux-line lattice is seen just above H(c1) in an applied field of only 54 Oe. A 30° reorientation of this vortex lattice has been observed in a very low field of 200 Oe. This reorientation transition appears to be first-order and could be explained by nonlocal effects. The magnetic field...
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