A magnetic powder for magnetic recording which has an average particle diameter of 0.01 to 0.3 micrometers and is represented by the following general composition formula wherein M.sup.I represents at least one metal element selected from Ba, Sr, Ca and Pb, M.sup.II represents at least one element selected from Si, Sn, Mo and W, M.sup.III represents at least one element selected from Ni, Cu, V, Zr, La, Ce, Nd, Sm, Mn, Zn, Mg, P, Cr, In, Tl and Ge, a, b, c, d, e, f and g respectively represent th...

A magnetic refrigeration composition for magnetic refrigeration including at least three kinds of magnetic substances selected from the group consisting of magnetic substances having the formula wherein R' is at least one element selected from the group consisting of Gd, Tb, Dy, Ho and Er, provided that the total number of atoms satisfies the above formula and O<.delta.<0.2, the composition being a mixture of the magnetic substances or a multilayered composition of the magnetic substances,...

Embodiments of the invention avoid erasure of recorded data by concentrating stray fields on a magnetic head element. According to one embodiment, in a magnetic storage apparatus using a perpendicular recording medium with a soft magnetic under layer, a soft magnetic shield is provided so as to surround the upper parts and sides of magnetic head elements. A distance between the soft magnetic shield and the medium is shorter than that between the soft magnetic shield and the magnetic head element...

A method of magnetic annealing a crystalline or nanocrystalline magnetic alloy under application of a dynamic magnetic field, i.e., an external magnetic field whose direction undergoes a periodic change in a plane, at an elevated temperature, preferably in a range of from about 300.degree. C. to about 800.degree. C. The applied dynamic magnetic field preferably has a maximum strength in a range of from about 1 to about 1000 Oersteds and is one of a rotation magnetic field, an elliptic-polarized ...

Provided is a magnetic head having a magnetoresistive device which has high output and is best suited to high-recording-density magnetic recording/reading. A magnetic sensor having large output can be realized by providing a magnetic sensor which comprises: a first ferromagnetic film; a conductor which intersects the first ferromagnetic film via a first intermediate layer; a current circuit structure which is connected so as to cause a current to flow from the first ferromagnetic layer to the co...

Two magnetoresistive layers are magnetostatically coupled and electrically interconnected for summation of an electrical current passing through each of them in the same direction which is slanted at 45.degree. with respect to the axes of easy magnetization of the layers, said axes being 90.degree. to each other from one layer to the other. When this transducer structure is placed in close proximity to a magnetic record the information significant discontinuities of which are perpendicular to th...

A machine tool having a magnetic backing plate with segmented elements.

A magnetic bearing is provided with two, at least partly separated, flux paths; one for the magnetic field of a permanent magnet and the other for the magnetic field of an electrical winding. The electromagnetic flux path includes a ferromagnetic part having a high permeability so that the electromagnetic field can be varied with the use of a relatively low input energy to the electrical winding. In some embodiments the two fields are superimposed upon one another in two air gaps between the bea...

A magnetic separator is provided with two rotors arranged in spaced relation one above the other on a driven vertical shaft and each rotor is provided on its circumference with a large number of uniformly distributed plate sets, whereby the joints between the plate sets on one rotor are displaced with respect to the joints between the plate sets on the other rotor. The rotors are disposed between diametrically disposed fixed magnetic poles, the ends of which are pointed in circumferential direct...

A handheld magnetic transducer comprises a magnetic core structure having a reading portion or keeper. The keeper has a curved surface. The gap of the reading means is in the form of a helix in order to provide greater flexibility in reading a magnetic record.