HRTEM Observation of the Superconductor Clathrate Compound, Ba<SUB>8</SUB>Si<SUB>46</SUB>
نویسندگان
چکیده
منابع مشابه
Observation of Sintering of Clathrate Hydrates
Clathrate hydrates have recently received attention as novel storage and transportation materials for natural gases or hydrogen. These hydrates are treated as powders or particles, and moderate storage temperatures (around 253 K) are set for economic reasons. Thus, it is necessary to consider the sintering of hydrate particles for their easy handling because the hydrates have a framework simila...
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In order to investigate ordered phases revealed at low temperatures in clathrate compound Pr3Pd20Si6, we have performed ultrasonic measurements using a single crystal in magnetic fields at low temperatures. Temperature dependence of elastic constant C11 and CL[11̄0] = (C11 + C12 + 2C44)/2 shows the anomalies at about 150 mK in zero field. Magnetic phase diagrams are determined by measuring C11 i...
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The high temperature form of melanophlogite, 46 Si02. 6M14 .2M12(M12=CH4, N2; M14=C02, N2), is cubic with space group Pm3n and a = 13.436(3) A at 200°C. The mineral is isostructural with the cubic gas hydrates of type I. Structure refinement with 667 independent reflections led to a weighted Rw = 0.040. Corner-sharing [Si04] tetrahedra form a 3dimensional framework which contains two types of c...
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Direct observation of spontaneous weak ferromagnetism in the superconductor ErNi2B2C.
Neutron measurements show that superconducting ErNi2B2C (T(C) = 11 K) develops antiferromagnetic spin density wave magnetic order (T(N) = 6 K), which squares up with decreasing temperature yielding a series of higher-order magnetic Bragg peaks with odd harmonics. Below T(WFM) = 2.3 K where magnetization indicates a net moment develops, even-order Bragg peaks develop which low field (approximate...
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ژورنال
عنوان ژورنال: Materia Japan
سال: 2001
ISSN: 1340-2625,1884-5843
DOI: 10.2320/materia.40.1036