Showing papers on "Laves phase published in 1968"
TL;DR: In this article, the Curie-Weiss behavior of twelve intermetallic systems designated by Ln x Ln' 1− x Al 2 where Ln and ln' are two different lanthanide metals is reported.
109 citations
92 citations
TL;DR: In this paper, the magnetic properties of the series of pseudo-binary compounds YFeuCo2-u have been examined in an attempt to obtain further information concerning the nature of the transition-metal moment in the cubic Laves-phase rare-earth -transition-metal compounds.
Abstract: The magnetic properties of the series of pseudo-binary compounds YFeuCo2-u have been examined in an attempt to obtain further information concerning the nature of the transition-metal moment in the cubic Laves-phase rare-earth - transition-metal compounds. The variation of the observed moment throughout the series can be understood on the basis of a non-localized moment associated with the transition-metal ion. The variation of the Curie temperature may be associated with the variation of the lattice parameter between the terminal compounds.
59 citations
TL;DR: In this article, the properties of the cubic Laves phases of the pseudo-binary alloys were investigated and the similarity to the behavior of alloys of elemental Co and Fe was pointed out.
Abstract: The hexagonal modifications of the Laves phases TiCr2, ZrCr2 and HfCr2 all exhibit Pauli paramagnetism with nearly the same susceptibility values (≈4 × 10≈4 e.m.u./mole). Measurements on the cubic modification of TiCr2 yield a slightly higher Pauli paramagnetic susceptibility (5 × 10−4 e.m.u./mole). The compounds TiCo2 and ZrCo2 form a single phase pseudo-binary system having the cubic Laves phase structure. The compounds exhibit Pauli paramagnetism with virtually constant susceptibility (1.44 to 1.53 × 10−3 e.m.u./mole) over the entire composition range. The YFe2YCo2 system is also single phase with the cubic Laves structure. These alloys are ferromagnetic over the entire composition range. As Co is substituted for Fe in YFe2 the saturation moment increases, passing through a maximum at the composition YFe1.4Co0.6. The striking similarity to the behavior of alloys of elemental Co and Fe is pointed out.
42 citations
TL;DR: In this article, factors influencing the choice of structure among members of such families are examined in elemental lanthanons and their LnM3 and Laves phase compounds, and some evidence is found that the 4f electrons influence the choosing of structure type.
22 citations
TL;DR: A phase diagram for the hafnium-chromium system based on the results of microscopic, X-ray and thermal analyses was proposed in this article, where the main features of the diagram are: a Laves phase, HfCr2, which melts congruently at 1825 °C and undergoes a crystallographic transformation between 1320 ° and 1360 °C; eutectic reactions at 1480 °C, and 29 at.% Cr; and a eUTectoid reaction at 1390 °C.
Abstract: A phase diagram is proposed for the hafnium-chromium system based on the results of microscopic, X-ray and thermal analyses. The main features of the diagram are: a Laves phase, HfCr2, which melts congruently at 1825 °C and undergoes a crystallographic transformation between 1320 ° and 1360 °C; eutectic reactions at 1480 °C and 29 at.% Cr and 1660 °C and 86 at.% Cr; and a eutectoid reaction at 1390 °C and 12 at.% Cr. It was confirmed that the stable form of HfCr2 at low temperatures has the face-centered cubic, MgCu2-type structure, while at high temperatures it has the hexagonal MgZn2 structure.
18 citations
TL;DR: In this paper, it has been confirmed by X-ray diffraction and magnetic studies that a cubic Laves phase Co 2 Ti exists in a composition range of less than one atomic percent around the stoichiometric composition.
Abstract: It has been confirmed by X-ray diffraction and magnetic studies that a cubic Laves phase Co 2 Ti exists in a composition range of less than one atomic percent around the stoichiometric composition. Magnetic measurements, made in the temperature range from 4.2° to 800°K, indicates that this cubic Laves phase compound is antiferromagnetic with the Neel temperature of 43°K. The reciprocal magnetic susceptibility vs. temperature curve in the paramagnetic state is strongly concave towards the temperature axis. The curve is described by a modified Curie-Weiss law, in which the effective magnetic moment of the cobalt atom is 0.45µ B .
18 citations
TL;DR: In this paper, the Mossbauer technique was employed to study the magnetism of Laves phase compounds, (Zr x Nb 1-x )Fe 2, and the results were obtained as follows; Hyperfine field strengths were about 200 kOe in the ferromagnetic compounds and very small value or zero in the antiferromagnetic compound.
Abstract: The Mossbauer technique was employed to study the magnetism of Laves phase compounds, (Zr x Nb 1- x )Fe 2 The results were obtained as followings; Hyperfine field strengths were about 200 kOe in the ferromagnetic compounds and very small value or zero in the antiferromagnetic compounds The values of the quadrupole coupling constant were slightly different between cubic (ferromagnetic compound) and hexagonal phases (antiferromagnetic compound) Isomer shifts were almost constant over all composition The magnetic moment, 042 µ B for x =06 was apparent value
10 citations
TL;DR: In this article, measurements of magnetization at temperatures down to 4°K and in applied fields up to 20 koe have been made on the cubic Laves phase compounds (Zr1-x Ti x )Zn2 for values of x ranging from 0 to 0·26.
Abstract: Measurements of magnetization at temperatures down to 4°K and in applied fields up to 20 koe have been made on the cubic Laves phase compounds (Zr1-x Ti x )Zn2 for values of x ranging from 0 to 0·26. Lattice parameters have also been measured. The magnetization and Curie temperature of the system increase with decreasing lattice parameter.
9 citations
TL;DR: Magnetic measurements in applied fields up to 16 kOe and at temperatures down to 4.2°K have been made on the cubic Laves phase compounds (Zr 1− x Hf x ) Zn 2 for 0 ⩽ x ⩾ 0.16 as discussed by the authors.
7 citations