The present invention provides a method for preparing iron oxide magnetic particles and iron oxide magnetic particles prepared thereby, wherein the method includes (a) synthesizing a complex by reacting iron and one or more compounds selected from the group consisting of an aliphatic hydrocarbonate having 4 to 25 carbon atoms and an amine compound, (b) synthesizing an iron oxide crystal nucleus by mixing the complex with a mixture of an unsaturated aliphatic hydrocarbon-based compound having 4 to 25 carbon atoms and an ether-based compound, and (c) forming a shell by mixing the iron oxide crystal nucleus and an MXn compound with a mixture of an unsaturated aliphatic hydrocarbon-based compound having 4 to 25 carbon atoms and an ether-based compound, wherein M is a heavy atom element, X is a halogen element, and n is an integer of 1 to 6.

A coil component includes an element assembly including a coil conductor formed by winding a conductor coated with an electrically insulating film and a magnetic portion containing metal magnetic particles and resin, and an outer electrode electrically connected to an exposed surface of an extended part of the coil conductor, exposed on a surface of the element assembly and disposed on the surface of the element assembly. The metal magnetic particles include first and second metal magnetic particles. A particle size distribution of the metal magnetic particles, calculated in accordance with a circle equivalent diameter obtained from a cross-sectional image in a cross section of the magnetic portion, has at least two peaks and at least one bottom. The large magnetic particles are larger than or equal to the bottom having a minimum frequency.

Disclosed herein is a method comprising disposing a first particle in a reactor; the first particle being a magnetic particle or a particle that can be influenced by a magnetic field, an electric field or a combination of an electrical field and a magnetic field; fluidizing the first particle in the reactor; applying a uniform magnetic field, a uniform electrical field or a combination of a uniform magnetic field and a uniform electrical field to the reactor; elevating the temperature of the reactor; and fusing the first particles to form a monolithic solid.

A coil component includes an element assembly including a coil conductor formed by winding a conductor coated with an electrically insulating film and a magnetic portion containing metal magnetic particles and resin, and an outer electrode electrically connected to an exposed surface, exposed on a surface of the element assembly, of an extended part of the coil conductor and disposed on a surface of the element assembly. The metal magnetic particles include first and second metal magnetic particles. A particle size distribution of the magnetic particles, calculated in accordance with a circle equivalent diameter obtained from a cross-sectional image in a cross section of the magnetic portion, has at least two peaks and at least one bottom. The first magnetic particles are larger than or equal to the bottom having a minimum frequency, and the second metal magnetic particles are smaller than the bottom having the minimum frequency.

A method of forming a single phase compositionally complex material including a plurality of transition metals is provided. The method includes creating a magnetic phase diagram to predict magnetic behavior, by calculating expected magnetic states and calculating the spin structure factor by Fourier transform; calculating the spin structure factor by Fourier transform; obtaining a transition temperature from the spin structure factor; selecting the plurality of transition metals and corresponding transition metal composition ratios for the material based on a desired magnetic behavior and the calculated spin structure factor; and forming the material that is a compositionally complex transition metal oxide comprising the plurality of transition metals at the selected composition ratios. The material may be a compositionally complex ABO.sub.3 perovskite film in which A is La and B is the plurality of transition metals including Cr, Mn, Fe, Co, and Ni.

The present invention provides iron oxide magnetic particles including an iron oxide and MX.sub.n, wherein M includes one or more selected from the group consisting of Cu, Sn, Pb, Mn, Ir, Pt, Rh, Re, Ag, Au, Pd, and Os, X includes one or more selected from the group consisting of F, Cl, Br, and I, and n is an integer of 1 to 6.

A multilayer coil component includes a body including multiple insulating layers stacked in a direction of stacking and having first and second end surfaces opposite each other in a length direction, first and second primary surfaces opposite each other in a height direction, perpendicular to the length direction, and first and second lateral surfaces opposite each other in a width direction, perpendicular to the length direction and to the height direction; a coil inside the body and including multiple coil conductors electrically connected together; and a first outer electrode extending from at least part of the first end surface of the body to part of the first primary surface and electrically coupled to the coil. The direction of stacking of the insulating layers and the direction of the coil axis of the coil are parallel with the first primary surface, which is the mounting surface, of the body.

A multilayer coil component includes a body formed by multiple insulating layers stacked in a direction of stacking and having first and second end surfaces opposite each other in a length direction, first and second main surfaces opposite each other in a height direction, perpendicular to the length direction, and first and second lateral surfaces opposite each other in a width direction, perpendicular to the length direction and to the height direction; a coil inside the body and including multiple coil conductors electrically coupled together; and a first outer electrode extending from at least part of the first end surface of the body to part of the first main surface and electrically coupled to the coil. The direction of stacking of the insulating layers and the direction of the coil axis of the coil are parallel with the first main surface, which is the mounting surface, of the body.

A method of controlling the electrical properties of a quantity of magnetite particles comprises the step of oxidising at least some of the quantity of magnetite particles by heating the said quantity of magnetite particles in an oxygen rich environment for a period of time.

Tapes and coils for superconducting magnets are provided, along with methods of making the tapes and coils. In one embodiment, the coil includes a rare earth barium copper oxide (REBCO) superconducting tape; and a thin resistive layer of copper oxide, Cr, Ni, or Ni—P substantially coated onto the REBCO superconducting tape, wherein the coated REBCO superconducting tape is wound into a coil form. In another embodiment, the coil includes at least two REBCO superconducting tapes; and a stainless steel tape interlayer disposed between the at least two REBCO superconducting tapes, wherein the stainless steel tape comprises a plating layer of nickel or copper, and wherein the at least two REBCO superconducting tapes together with the stainless steel tape interlayer are wound into a coil form.