Abstract: In a method for strip-wound core strips composed of amorphous ferromagnetic material, an amorphous ferromagnetic strip composed of a cobalt-based alloy which contains additives of iron and/or manganese in a proportion of between 1 and 10% by atomic weight of the alloy is cast from a melt by means of rapid solidification. The amorphous ferromagnetic strip is then subjected to a magnetic field transversely with respect to the strip direction as it passes through heat treatment. Once the strip-wound core strips have been cut to length from the heat-treated, amorphous ferromagnetic strip, strip-wound cores, preferably toroidal strip-wound cores, are wound. These strip-wound cores can be used to produce inductive components which have excellent magnetic characteristics, and, in particular, inductive components can be produced whose toroidal strip-wound cores have a mean diameter of d≦10 mm.

Abstract: A label for use in a magnetoelastic electronic article surveillance system has a strip of an amorphous alloy, forming a resonator having a resonant frequency, when activated by a magnetically semi-hard strip. The strip of amorphous alloy is fixed at one side to the magnetically semi-hard strip, and has a length of ¼ wavelength of the resonant frequency.

Abstract: A marker for employment in a magnetic merchandise monitoring system is composed of one or more oblong, ductile, magnetostrictive strips composed of amorphous ferromagnetic material. These strips experience a change in resonant frequency due to a change of a pre-magnetization field and are excited to longitudinal, mechanical resonant oscillation at the resonant frequency f.sub.r due to an alternating magnetic field, whereby the mechanical stresses resulting from the resonant oscillations cause a change in magnetization of the strips and, thus, a detectable change of the alternating magnetic field. The material of which the strips are composed exhibits a flat B-H loop that proceeds optimally linearly into the range of saturation; further, the strips exhibit a magnetic anisotropy transverse to the longitudinal strip direction, whereby the anisotropy field strength is greater than the pre-magnetization field strength.

Abstract: In the ISDN telecommunication system, the connection between a digital local exchange and the network termination ensues via a public two-wire line at whose ends what are referred to as U-transformers reside. When the network termination leads to a terminal subscriber, then this is called a U.sub.k0 interface whereat the line length between the transformers can amount to up to 8 km. The bit error rate of the transmitted pulses must be <10.sup.-7, whereby the pulses have direct currents for the remote feed of the terminal subscribers that can amount to up to 80 mA superimposed on them. For such U.sub.K0 transformers, a toroidal tape core of a soft-magnetic, amorphous, magnetostriction-free alloy tape is employed. The manufactured toroidal tape core is tempered in a magnetic field, this thermal treatment ensuing in a protective gas atmosphere.

Abstract: A resonator for use in a marker in a magnetomechanical electronic article surveillance system is formed by a planar strip of an amorphous magnetostrictive alloy having a composition Fe.sub.a Co.sub.b Ni.sub.c Si.sub.x B.sub.y M.sub.z wherein a, b, c, x, y, and z are at % and a+b+c+x+y+z=100, a+b+c>75, a>15, b<20, c>5 and z<3, wherein M is at least one element selected from the group consisting of C, P, Ge, Nb, Mo, Cr and Mn, the amorphous magnetostrictive alloy having a resonant frequency f.sub.r which is a minimum at a field strength H.sub.min and having a linear B-H loop up to at least a field strength which is about 0.8 H.sub.min and a uniaxial anisotropy perpendicular to the plane of the strip with an anisotropy field strength H.sub.k which is at least as large as H.sub.min and, when driven by an alternating signal burst in the presence of a bias field H.sub.

Abstract: A ferromagnetic resonator for use in a marker in a magnetomechanical electronic article surveillance system has improved magnetoresonant properties and/or reduced eddy current losses by virtue of being annealed so that the resonator has a fine domain structure with a domain width less than about 40 .mu.m, or less than about 1.5 times the thickness of the resonator. This produces in the resonator an induced magnetic easy axis which is substantially perpendicular to the axis along which the resonator is operated magnetically by a magnetic bias element also contained in the marker.

Abstract: A resonator for use in a marker, with a bias element which produces a bias field, in a magnetomechanical electronic article surveillance system is composed of an amorphous magnetostrictive alloy containing iron, cobalt, nickel, silicon and boron in quantities for giving the resonator a quality Q which is between about 100 and 600. The amorphous magnetostrictive alloy is annealed in a transverse magnetic field for giving it a B-H loop which is linear up to about 8 Oe and an anisotropy field strength of at least 10 Oe. When the resonator is excited to resonate by a signal emitted by the transmitter in the surveillance system, it produces a signal at a mechanical resonant frequency which can be detected by the receiver of the detection system. Due to the resonator having a quality Q in the above range, the signal produced by the resonator in a first detector window, beginning approximately 0.

Abstract: For security against theft or for identification of products using an electronic alternating field in an interrogation zone, a pulse generator, upon magnetic reversal due to a Barkhausen jump, exhibits an impulse behavior that produces characteristic harmonics and largely prevents confusion with other magnetically soft materials in the interrogation zone. This pulse generator is formed of an amorphous strip or an amorphous wire with a cobalt content of at least 20 at-%, subjected to a heat treatment by a current flowing through the strip or wire, to produce a ratio of remanence induction to saturation induction of between 0.2 and 0.9.

Abstract: Amorphous alloys having the formulaFe.sub.a Co.sub.b Ni.sub.c Si.sub.x B.sub.y M.sub.zare employed as monitoring strips for mechanically oscillating tags, for example for anti-theft protection, together with a source of a pre-magnetization field in which the strip is disposed so as to place the strip in an activated state. In the formula, M denotes one or more elements of groups IV through VII of the periodic table, including C, Ge and P, and the constituents in at % meet the following conditions: a lies between 20 and 74, b lies between 4 and 23, c lies between 5 and 50, with the criterion that b+c>14, x lies between 0 and 10, y lies between 10 and 20, and z lies between 0 and 5 with the sum x+y+z being between 12 and 21. These alloys have a resonant frequency associated therewith and when passed through an alternating field whose alternation frequency coincides with the resonant frequency, a pulse having a signal amplitude is produced.

Abstract: In an ISDN digital communications system, the transmission between the network termination and the terminal equipment ensues via what is referred to as the S.sub.o interface, on the basis of interface transformers. Since the power supply of the terminal equipment likewise partly ensues via these transformers, a current asymmetry in the lines results in a pre-magnetization of the transformers. Thus, the ISDN demands made of the transformers must also be satisfied given a DC pre-magnetization. Compact transformers having a simple winding format that satisfy the ISDN demands are set forth, the transformers utilizing a magnetic core having a fine-crystalline iron-based alloy with an iron part of more than 60 atomic %, the structure thereof being more than 50% fine-crystalline grains having a grain size of less than 100 nm and having a remanence ratio of less than 0.2 and a permeability in the range from 20,000 to 50,000, and an inductance of less than 100 pF.

Abstract: An amorphous alloy free of magnetostriction is employed in anti-theft labels, magnetic field detectors or the like, having a saturation induction of B.sub.s .ltoreq.0.5T and a good responsiveness given an annealing treatment in the magnetic field for achieving a remanance relationship of B.sub.r /B.sub.s >0.6.

Abstract: A method for achieving a flat magnetization loop in cores, such as for use in inductive components, which are wound of amorphous ribbon includes the steps of subjecting the wound core to long-term heat treatment of more than 10 hours, and selecting the temperature during the heat treatment so low that less than half of the ribbon cross-section exhibits crystalline precipitations which occur during the heat treatment.