The present disclosure is directed to methods of Quantum Spin Engineering of spinel superparamagnetic ferrite nanoparticles (SMFNs) for MRI contrast agents and for magnetohyperthermia agents. Using the methods herein, the magnetic properties of the SMFNs can be controlled by changing the amount of 3d-transition element cations having unpaired electrons in the 3d orbital that occupy the octahedral sites of the spinel crystal form, to form mixed spinels, while anions in the spinels can be utilized to magnetically couple the cations utilizing intra-crystalline angles determined by ion sizes and crystal structure, and further tuning of other critical parameters is provided. The mixed spinels disclosed herein provide enhanced MRI contrast agents and improved magnetohyperthermia agents with lower toxicity and safety concerns, while the production methods disclosed herein have lower cost.

Disclosed herein are embodiments of low temperature co-fireable dielectric materials which can be used in conjunction with high dielectric materials to form composite structures, in particular for isolators and circulators for radiofrequency components. Embodiments of the low temperature co-fireable dielectric materials can be scheelite or garnet structures, for example barium tungstate. Adhesives and/or glue is not necessary for the formation of the isolators and circulators.

Disclosed herein are embodiments of low temperature co-fireable barium tungstate materials which can be used in combination with high dielectric materials, such as nickel zinc ferrite, to form composite structures, in particular for isolators and circulators for radiofrequency components. Embodiments of the material can include flux, such as bismuth vanadate, to reduce co-firing temperatures.

Disclosed herein are embodiments of low temperature co-fireable dielectric materials which can be used in conjunction with high dielectric materials to form composite structures, in particular for isolators and circulators for radiofrequency components. Embodiments of the low temperature co-fireable dielectric materials can be scheelite or garnet structures, for example barium tungstate. Adhesives and/or glue is not necessary for the formation of the isolators and circulators.

A method of providing a particulate material from an at least substantially metallic and/or ceramic starting material, comprising the following steps:

(a) generating the particulate material from the starting material by vaporizing the starting material by introducing energy, preferably radiation energy, in particular by means of at least one laser, into the starting material and subsequently at least partially condensing the vaporized starting material,

b) collecting the particulate material in at least one receiving and/or transporting device, in particular at least one container,

c) receiving, in particular storing, and/or transporting the particulate material in the receiving and/or transporting device and/or in a further receiving and/or transporting device such that it can be used for a subsequent process, in particular in a state of at least non-permanent passivation, and

d) providing the particulate material for the subsequent process.

Embodiments disclosed herein relate to using cobalt (Co) to fine tune the magnetic properties, such as permeability and magnetic loss, of nickel-zinc ferrites to improve the material performance in electronic applications. The method comprises replacing nickel (Ni) with sufficient Co.sup.+2 such that the relaxation peak associated with the Co.sup.+2 substitution and the relaxation peak associated with the nickel to zinc (Ni/Zn) ratio are into near coincidence. When the relaxation peaks overlap, the material permeability can be substantially maximized and magnetic loss substantially minimized. The resulting materials are useful and provide superior performance particularly for devices operating at the 13.56 MHz ISM band.

A multilayer coil array includes an element body including a magnetic layer; first and second built-in coils; and first to fourth outer electrodes connected to the first and second coils. A non-magnetic layer is provided between the first and second coils. The first and second coils are each formed by a plurality of coil conductors being connected to each other. At least one out of a coil conductor of the first coil that is closest to the second coil among the plurality of coil conductors of the first coil and a coil conductor of the second coil that is closest to the first coil among the plurality of coil conductors of the second coil contacts the non-magnetic layer. The length of a coil conductor layer that contacts the non-magnetic layer of the coil conductor contacting the non-magnetic layer is different from the length of the other coil conductor layers.

A method of obtaining a nickel zinc cobalt spinet ferrite in ceramic form that includes the following: obtaining a precipitate (1) of iron, nickel, zinc, and cobalt hydroxides by co-precipitation, rinsing the precipitate (2), drying and grinding (3) the rinsed precipitate in order to obtain a powder; forming (4) into a compact by pressing the powder, and sintering (5) the compact. The sintering (5) includes a progressive temperature rise of 2° C. to 4° C. per minute, from an ambient temperature to reach a maximum temperature comprised between 950° C. and 1.010° C., maintaining at the maximum temperature for forty-five minutes to three hours, a progressive fall in temperature of 2° C. to 4° C. per minute to reach ambient temperature. The foregoing and, in particular, the sintering, enable a material to be obtained that is particularly well-adapted to the manufacture of an antenna configured for frequencies less than one gigahertz.

A method of providing a particulate material from an at least substantially metallic and/or ceramic starting material, comprising the following steps: (a) generating the particulate material from the starting material by vaporizing the starting material by introducing energy, preferably radiation energy, in particular by means of at least one laser, into the starting material and subsequently at least partially condensing the vaporized starting material, b) collecting the particulate material in at least one receiving and/or transporting device, in particular at least one container, c) receiving, in particular storing, and/or transporting the particulate material in the receiving and/or transporting device and/or in a further receiving and/or transporting device such that it can be used for a subsequent process, in particular in a state of at least non-permanent passivation, and d) providing the particulate material for the subsequent process.

A ferrite sintered body contains Fe, Mn, Zn, Cu, and Ni. Supposing that Fe, Mn, Zn, Cu, and Ni are converted into Fe.sub.2O.sub.3, Mn.sub.2O.sub.3, ZnO, CuO, and NiO, respectively, and the sum of the contents of Fe.sub.2O.sub.3, Mn.sub.2O.sub.3, ZnO, CuO, and NiO is 100 mol %, the sum of the contents of Fe.sub.2O.sub.3 and Mn.sub.2O.sub.3 is 48.47 mol % to 49.93 mol %, the content of Mn.sub.2O.sub.3 is 0.07 mol % to 0.37 mol %, the content of ZnO is 28.95 mol % to 33.50 mol %, and the content of CuO is 2.98 mol % to 6.05 mol %. Furthermore, 102 ppm to 4,010 ppm Zr in terms of ZrO.sub.2 and 10 ppm to 220 ppm Al in terms of Al.sub.2O.sub.3 are contained per 100 parts by weight of the sum of the amounts of contained Fe.sub.2O.sub.3, Mn.sub.2O.sub.3, ZnO, CuO, and NiO.