The present invention is characterized as means to scan remove magnetic particles from a magnetic coated tape; from tape having a magnetic printed basic pattern thereon such as equidistant longitudinal lines; from tape having a magnetically printed halftone continuous pattern thereon, such magnetic removal accomplished by passing the tape through the pole faces of a magnetic recording head, or passing the tape in operative relation to a magnetic transducer means. At least one of the poles of the...

Novel magnetic alloys for magnetic heads are provided and are broadly of the formula, Fe-O-N. In a more specific embodiment, the alloys are of the compositional formula, Fe.sub.v N.sub.w O.sub.x M.sub.y, wherein M represents a member selected from the group consisting of Ta, Nb, Si and mixtures thereof, and v, w, x and y are, respectively, such values by atomic percent that 1.ltoreq.w.ltoreq.20, 1.ltoreq.x.ltoreq.20 and 0.5.ltoreq.y.ltoreq.6 provided that v+w+x+y=100. These alloys may further co...

A magnetic float for a magnetic sensor wherein magnetized magnetic powder is dispersed into a foamed synthetic resin, and the magnetic flux thereof acts on a reed switch in the magnetic sensor to turn on or off the reed switch. The magnetic powder is substantially wholly coated with the synthetic resin.

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 R'Al.sub.2, R'.sub.3 Al.sub.2, and R'Al.sub.2+.delta. 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 0<.delta.<0.2, the composition being a mixture of the magnetic substances, wh...

Disclosed herein are magnetic particles for a magnetic toner containing a low-molecular binder resin having a weight-average molecular weight of not more than 150,000, said magnetic particles comprising particulate magnetic particles containing iron as the main ingredient and having an oil absorption of not more than 24 ml/100 g and a degree of compaction of not less than 56, and a magnetic toner containing the said magnetic particles.

A magnetic refrigerant for magnetic refrigeration which comprises a sintered body containing at least one of rare earth elements selected from the group consisting of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and yttrium and a balance consisting essentially of at least one of aluminum, nickel and cobalt. This invention provides sintered magnetic bodies which are suited for use as magnetic refri...

Disclosed are a magnetic ribbon on at least one surface of which fine particles formed of a nonmagnetic inorganic substance having insulating properties are attached and a magnetic core around which this magnetic ribbon is wound or on which it is laminated. The fine particles serve as a spacer to form a layer of air between adjacent layers of the magnetic ribbon.

A magnetic head suitable for use in a magnetic disk. In a magnetic head in accordance with the present invention, a read/write head and an erase head are placed side by side in the rotation direction of the magnetic disk. A gap in the read/write head is placed at a distance of l from a pair of gaps in the erase head. In addition, the read/write gap in the read/write head is deviated by a distance L in the external circumference direction with respect to a pair of erase gaps in the erase head.

A magnetic material having an Fe-Si-Al type magnetic alloy with addition of one or more additive elements selected from a group consisting of Be, Mg, Ca, Sr, Ba, Sc, Y, Nb, Ta and Hf. The material has been subjected to an oxidation heat-treatment so as to contain a predetermined amount of oxygen.

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 R'Al.sub.2, R'.sub.3 Al.sub.2, and R'Al.sub.2+.delta. 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 0<.delta.<0.2, the composition being a mixture of the magnetic substances or ...