Results 121 to 130 of about 2,333 (165)

MAGNETISM OF ACTINIDE–3d LAVES PHASES INTERMETALLICS

Journal of Magnetism and Magnetic Materials, 1987
Abstract The magnetic properties of actinide-3d metal Laves phase compounds AnFe 2 , AnCo 2 and AnNi 2 (An = U, Np, Pu) are qualitatively discussed on the basis of a previously obtained Hartree-Fock criterion including d-f hybridization and Coulomb interactions.
A. Troper, A.A. Gomes
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Hydrogen diffusion in the Laves-phase compound TiCr1.78

Materials Science and Engineering: A, 2009
The temperature dependence of the Young's modulus and of the internal friction (IF) has been investigated between 80 and 300 K at acoustical frequencies in the hexagonal (C14) Laves-phase TiCr1.78 charged with hydrogen. In this compound H occupies tetrahedral interstitial sites which are grouped in interlinked hexagons. A mechanical relaxation has been
G Mazzolai, B Coluzzi, A Biscarini, FM Mazzolai, A Tuissi, F Agresti, G Principi, S Lo Russo   +7 more
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Vacancy induced anomalies in the Laves phase CeNi 2

Journal of Magnetism and Magnetic Materials, 1987
Abstract For the cubic Laves phase CeNi 2 , pronounced anomalies have been observed in the lattice spacings and micro-hardness values with quenching from elevated temperatures and in the high temperature thermal expansion behaviour. All these effects have been attributed to the production of a high concentration of vacancies at high temperatures.
T.C. SHIELDS, J. MAYERS, I.R. HARRIS
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Search for superconductivity in Laves phase compounds

Physics Letters A, 1974
Abstract A search for superconductivity in the Laves phase compounds ZrW 2 , HfW 2 , TiCr 2 , ZrCr 2 , ZrMo 2 and HfMo 2 is reported. ZrMo 2 is found to be superconducting at 0.12 K. Superconductivity in HfMo 2 in the cubic phase is reconfirmed while the hexagonal phase is also found to be superconducting at about the same temperature.
Ö. Rapp, J. Invarsson, T. Claeson
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Antiferromagnetism of the hexagonal Laves phase ThMn2

Journal of Magnetism and Magnetic Materials, 1987
Abstract Magnetization, thermal expansions and neutron diffraction measurements have been performed on ThMn2. Below TN, one Mn atom (2a) in four remains nonmagnetic whilst the others order in a triangular configuration. The large anistropic thermal expansions effects minimize the frustration of the Mn-Mn interactions.
J. Deportes, R. Lemaire, B. Ouladdiaf, E. Roudaut, F. Sayetat   +4 more
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Room-temperature deformation in a Laves phase

Journal of Materials Research, 1990
Transmission electron microscopy of two-phase V-Hf-Nb and V-Hf-Nb-Ti alloys plastically deformed at room temperature shows that {111} (112) twinning is a major deformation mode for the HfV2-based Laves phase. Bands of concentrated shear are also observed. Possible approaches to enhance low-temperature deformability in other Laves phases are discussed.
J. D. Livingston, E. L. Hall
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Helimagnetism in the cubic Laves phase YMn2

Journal of Magnetism and Magnetic Materials, 1987
Abstract Neutron diffraction experiments on YMn 2 using a wave length of λ N = 2.483 A show a splitting of the magnetic peaks. The magnetic structure is helimagnetic consistent with an angle modulation of the previously reported antiferromagnetic structure.
R. Ballou, J. Deportes, R. Lemaire, Y. Nakamura, B. Ouladdiaf   +4 more
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Hydride properties of AB2 laves phase compounds

Journal of the Less Common Metals, 1978
Abstract The hydrogen sorption and physical properties of Laves phase AB2 intermetallic compounds are reviewed. The work contains a list of AB2 compounds and their hydrogen capacities. The preferred location of hydrogen in different tetrahedral interstitial sites is calculated assuming the formation of “binary hydrides” between the hydrogen and the ...
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Ternary ordered Laves phases RENi4Cd

Intermetallics, 2012
Abstract The ordered Laves phases RE Ni 4 Cd ( RE  = Sc, Y, Ce, Pr, Nd, Sm, Gd–Lu) were obtained by melting of the elements in sealed tantalum ampoules in a muffle furnace followed by slow cooling of the samples down to 773 K. The compounds were characterized by powder X-ray diffraction.
Frank Tappe, Christian Schwickert, Rainer Pöttgen   +2 more
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Electronic structures of Laves phase compounds

Journal of Magnetism and Magnetic Materials, 1987
Abstract The electronic structures of Laves phase compounds AB2 (A = Y, Zr, Nb; B = Cr, Mn, Co, Ni) were investigated systematically by the LMTO method within the framework of the LSD approximation. Comparing the calculated total energy for hypothetical para-, ferro-, and antiferromagnetic state with the C14 and the C15 structure, the theoretical ...
Setsuro Asano, Shoji Ishida
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