Abstract: An Fe-based soft magnetic alloy essentially consisting of an Fe-based alloy including fine crystal grains used for such as a magnetic core. An average size of the fine crystal grains is controlled to 300.ANG. or less. Each of the fine crystal grains is composed of a body-centered cubic phase at least partially including a super lattice. This alloy has a high saturation flux density and excellent soft magnetic characteristics such as a low iron loss and a high magnetic permeability. This alloy is suitable as a core material for various kinds of choke coils.

Abstract: The extremely low temperature cold accumulating material for use in refrigerators, for example, comprises particles containing at least one kind of rare earth element selected from a group consisting of Y, La, Ce, Pr, Nd, Pm, Sm Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb. The proportion of particles each having a particle size of 0.01 to 3 mm is 70% or greater by weight with respect to the whole particles and the proportion of particles each having a shape such that the ratio of the major diameter to the minor diameter is not greater than 5 is 70% or greater by weight with respect to the whole particles. The particles are manufactured by quenching and solidifying a molten metal containing at least one kind of rare earth element described above. The thus manufactured extremely low temperature cold accumulating material is improved in cold accumulating efficiency and is specifically improved in mechanical strength and in chemical stability.

Abstract: An improved permanent magnet composition comprising 22 to 28 wt % R, 5 to 16 wt % iron, 0.2 to 6.5 wt % copper, 0.1 to 6 wt % manganese, 0.5 to 6 wt % A, 0.1 to 2 wt % B and the balance cobalt, in which R is at least one of rare earth elements including yttrium, A is at least one of zinc and zirconium and B is at least one element selected from the group of aluminum, bismath and thallium.

Abstract: Disclosed are permanent magnet powders consisting of the compositional formula:R.sub.x M.sub.y Si.sub.z Ta.sub.w T.sub.100-x-y-z-w orR.sub.x M.sub.y Si.sub.z Ta.sub.w (T+Q).sub.100-x-y-z-w'wherein x, y, z and w are, in atomic percent, 7.ltoreq.x.ltoreq.15, 1.ltoreq.y.ltoreq.10, 0.05.ltoreq.z.ltoreq.5.0 and 0.005.ltoreq.w.ltoreq.0.1; T is essentially Fe or a combination of Fe and Co; Q is at least one element selected from the group consisting of Ti, V, Cr, Mn, Ni, Cu, Zr, Nb, Mo, Hf and W; M is at least one element selected from the group consisting of B, C, Al, Ga, and Ge; and R is at least one element selected from the group consisting of Y and lanthanides. The permanent magnet powders have desirable magnetic properties of good squareness, Hk/iHc of at least 0.45 in a 4.pi.I-H demagnetization curve (wherein Hk is H at 4.pi.I=0.9Br in the 4.pi.

Abstract: An Fe-based soft magnetic alloy essentially consisting of an Fe-based alloy including fine crystal grains used for such as a magnetic core. An average size of the fine crystal grains is controlled to 300 .ANG. or less. Each of the fine crystal grains is composed of a body-centered cubic phase at least partially including a super lattice. This alloy has a high saturation flux density and excellent soft magnetic characteristics such as a low iron loss and a high magnetic permeability.

Abstract: Fe-base soft magnetic alloy powder and dust core having the composition represented by the general formula:(Fe.sub.1-a M.sub.a).sub.100-x-y-z-.alpha.-.beta.-.gamma. Cu.sub.x Si.sub.y B.sub.z M'.sub..alpha. M".sub..beta. X.sub..gamma.wherein M is Co and/or Ni, M' is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti and Mo, M" is at least one element selected from the group consisting of V, Cr, Mn, Al, elements in the platinum group, Sc, Y, rare earth elements, Au, Zn, Sn and Re, X is at least one element selected from the group consisting of C, Ge, P, Ga, Sb, In, Be and As, and a, x, y, z, .alpha., .beta. and .gamma. respectively satisfy 0.ltoreq.a.ltoreq.0.5, 0.1.ltoreq.x.ltoreq.3, 0.ltoreq.y.ltoreq.30, 0.ltoreq.z.ltoreq.25, 0.ltoreq.y+z.ltoreq.35, 0.1.ltoreq..alpha..ltoreq.30, 0.ltoreq..beta..ltoreq.10 and 0.ltoreq..gamma..ltoreq.10, at least 50% of the alloy structure being fine crystalline particles having an average particle size of 500 .ANG. or less.

Abstract: A ceramic superconductor is made by consolidating a plurality of metals and a chalcogen and applying a magnetic field during the consolidation operation.

Abstract: To obtain an anticorrosive Fe-B-R type permanent magnet; in particular, to reduce deterioration rate of the initial magnetic properties below 10% after the magnet has been kept at 80.degree. C. in 90% relative humidity for 500 hours, the surface of the sintered permanent magnet is coated with metallic coating film layers of at least one noble metal layer and at least one base metal layer disposed on the noble metal layer. Diffusion heat treatment further improves the adhesiveness of the coating film layers.

Abstract: An Fe-base soft magnetic alloy having the composition represented by the general formula:(Fe.sub.1-a M.sub.a).sub.100-x-y-z-.alpha.-.beta.-.gamma. Cu.sub.x Si.sub.y B.sub.z M'.sub.60 M".sub..beta. X.sub..gamma.wherein M is Co and/or Ni, M' is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti and Mo, M" is at least one element selected from the group consisting of V, Cr, Mn, Al, elements in the platinum group, Sc, Y, rare earth elements, Au, Zn, Sn and Re, X is at least one element selected from the group consisting of C, Ge, P, Ga, Sb, In, Be and As, and a, x, y, z, .alpha., .beta. and .gamma. respectively satisfy 0.ltoreq.a.ltoreq.0.5, 0.1.ltoreq.x.ltoreq.3, 0.ltoreq.y.ltoreq.30, 0.ltoreq.z.ltoreq.25, 5.ltoreq.y+z.ltoreq.30, 0.1.ltoreq..alpha..ltoreq.30, .beta..ltoreq.10 and .gamma..ltoreq.10, at least 50% of the alloy structure being fine crystalline particles having an average particle size of 1000 .ANG. or less.

Abstract: A sputtering target suitable for use in preparing a magneto-optic recording medium having the composition:[(LR).sub.x (HR).sub.1-x ].sub.y (Fe.sub.w A.sub.1-w).phi.-y-zM.sub.zwherein HR is at least one heavy rare earth element selected from the group consisting of gadolinium (Gd), terbium (Tb) and dysprosium (Dy); LR is at least one light rare earth element selected from the group consisting of cerium (Ce), praseodymium (Pr), neodymium (Nd) and samarium (Sm); M is at least one element selected from the group consisting of titanium (Ti), aluminum (Al), chromium (Cr) and copper (Cu); A is at least one transition metal element selected from the group consisting of cobalt (Co) and nickel (Ni); x is between about 0.05 and 0.60; w is between about 0.5 and 1.0; y is between about 10 and 50; and z is between about 0 and 15 is provided. A method of casting the sputtering target so as to form a target having an oxygen impurity content of less than about 500 ppm is also provided.