Filters
Results 1 - 10 of 428325
Results 1 - 10 of 428325.
Search took: 0.211 seconds
| Sort by: date | relevance |
[en] The temperature dependence of the magnetic susceptibility of beryllium single crystals is studied between 4.2 and 1500K. A theoretical interpretation of the dependence is presented. At T=870 K an anomalously high diamagnetism peak is observed in the basal plane. It can be ascribed to the chemical potential level approaching the degeneration point on the Σ line. Calculations are carried out of the temperature changes of the beryllium spectrum parameters near the band degeneration point and of the respective dependences of the susceptibilities on the chemical potential level at various temperatures; the calculations are performed for the model of a nonlocal pseudopotential and an isotropic Debye-Waller factor. The position of the chemical potential level relative to the degeneration point is determined in the range 500< T<1300 K by comparing the calculations and experimental results
Journal
Zhurnal Ehksperimental'noj i Teoreticheskoj Fiziki; ISSN 0044-4510; 
; v. 75(3); p. 993-999
; v. 75(3); p. 993-999
[en] Published in summary form only
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195; ; CODEN VDPEA; v. 25(4); p. 1281
; CODEN VDPEA; v. 25(4); p. 1281
[en] Using experimental values of the α-In2Se3 heat capacity in the 5-298 K temperature range for 298-704 K temperature variations of In2Se3 thermodynamic functions in the 5-700 K range have been calculated. For calculating enthalpy and entropy the method of numerical integration of csub(p)=f(T) and csub(p)/T=f(T) dependences has been applied. From enthalpy and entrory obtained values temperature pariations of the given thermodynamic potential have been determined
Journal
Izv. Akad. Nauk SSSR, Neorg. Mater; ISSN 0002-337X; ; v. 20(10); p. 1765-1766
; v. 20(10); p. 1765-1766
[en] The heat capacity of plutonium nitride has been measured between 10 K and 300 K. A peak occurs at 17.8 K, the Neel point, with an associated magnetic entropy of 0.023 J K-1 mol-1. Low-temperature results indicate an electronic heat-capacity coefficient of about 66 mJ K-2 mol-1 and a Debye characteristic temperature of 255 K. The value of the heat capacity at 298.15 K is 49.6 J K-1 mol-1. and of the entropy is 64.8 J K-1 mol-1. (author)
Journal
Journal of Chemical Thermodynamics; ISSN 0021-9614; ; v. 10(10); p. 935-940
; v. 10(10); p. 935-940
[en] Silicon, a high melting point, low expansivity, cubic material which can be obtained readily in high purity form, provides an excellent thermal expansion standard. Various absolute determinations of the thermal expansivity of both single crystal and polycrystalline silicon are used to establish a smooth relationship from 90 to 850 K which is believed to be reliable to roughly 10-8 K-1, and which is extrapolated to 1000 K. Values also are suggested for temperatures to absolute zero. Key words: high temperature expansivity; silicon; standard expansivities; thermal expansivity
Journal
Journal of Physical and Chemical Reference Data; ISSN 0047-2689; ; v. 12(2); p. 179-182
; v. 12(2); p. 179-182
| 1 | 2 | 3 | Next |