Electronic Specific Heats and Superconductivity in the Group-V Transition Metals

1971 ◽  
Vol 3 (6) ◽  
pp. 1856-1861 ◽  
Author(s):  
M. Ishikawa ◽  
Louis E. Toth
Keyword(s):  
Transition Metals ◽  
Group V ◽  
Specific Heats

Tetracarbonylcyclopentadienyl Compounds of the Group V Transition Metals

1964 ◽  
Vol 3 (2) ◽  
pp. 298-300 ◽  
Author(s):  
Robert P. M. Werner ◽  
Allen H. Filbey ◽  
Switlana A. Manastyrskyj
Keyword(s):  
Transition Metals ◽  
Group V

First Principles Calculations of Helium Solution Energies in BCC Transition Metals

2006 ◽  
Vol 981 ◽  
Author(s):  
François Willaime ◽  
Chu Chun FU
Keyword(s):  
Transition Metals ◽  
Density Functional ◽  
Tetrahedral Site ◽  
Density Functional Theory Calculations ◽  
Interstitial Site ◽  
Group Vi ◽  
Functional Theory ◽  
Group V ◽  
Substitutional Site ◽  
Exchange Correlation

AbstractDensity functional theory calculations of the solution energies of helium in substitutional, tetrahedral and octahedral sites have been performed for all BCC transition metals: V, Nb, Ta, Cr, Mo, W and Fe. The effects of exchange correlation functional and of pseudopotential have been investigated in Fe; they are relatively small. The solution energies are found to be weakly dependent on the element for the substitutional site whereas for the interstitial sites they are much smaller in group V than in group VI and they decrease from 3d to 4d and 5d metals. As a result an inversion is observed from V, Nb and Ta - which tend to favor the interstitial site - to Mo and W, which favor the substitutional one, with an intermediate behavior for Cr and Fe. Finally, the results indicate that the tetrahedral site is always energetically more favorable than the octahedral one by 0.2 to 0.3 eV.

Synthesis and properties of acetylenic ?-complexes of group V transition metals

1969 ◽  
Vol 18 (1) ◽  
pp. 87-92 ◽  
Author(s):  
A. N. Nesmeyanov ◽  
K. N. Anisimov ◽  
N. E. Kolobova ◽  
A. A. Pasynskii
Keyword(s):  
Transition Metals ◽  
Group V

Effect of magnetic field on the specific heats of intercalation compounds Mx TiS2 (M=3d transition metals)

1996 ◽  
Vol 103 (1-2) ◽  
pp. 107-127 ◽  
Author(s):  
Kouichi Takase ◽  
Hiroshi Negishi ◽  
Minoru Sasaki ◽  
Masasi Inoue
Keyword(s):  
Magnetic Field ◽  
Transition Metals ◽  
Intercalation Compounds ◽  
Specific Heats

Vibration Spectra and Debye Temperatures of Some Transition Metals

1971 ◽  
Vol 26 (4) ◽  
pp. 747-752 ◽  
Author(s):  
P. K. Sharma ◽  
B. S. Semwal ◽  
K. N. Mehrotra
Keyword(s):  
Transition Metals ◽  
Neutron Scattering ◽  
Force Constant ◽  
Lattice Vibration ◽  
Lattice Vibrations ◽  
Calorimetric Data ◽  
Vibration Spectra ◽  
Specific Heats ◽  
Debye Temperatures ◽  
Theory And Experiment

Abstract The lattice vibration spectra and the associated constant volume specific heats of the transition metals niobium, tantalum, chromium, and palladium have been determined by using Sharma and Joshi's three-force constant model which includes the effect of electrons on lattice vibrations in metals. The calculated values of the specific heats and the equivalent Debye temperatures are com­pared with available calorimetric data. The frequency versus wave vector dispersion relations along the three major symmetry directions of chromium and palladium are determined and compared with curves deduced from recent neutron scattering experiments. Reasonably satisfactory agreement between theory and experiment is obtained.

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