There are provided a magnetic work body unit in which plate-shaped magnetic work bodies can be easily laminated and a magnetic heat pump device using the same. Magnetic work body units 26A to 26D are provided with a plurality of plate-shaped magnetic work bodies 28 laminated in a zigzag shape as viewed in the flowing direction of a heat medium between the facing inner surfaces of rectangular ducts 27A to 27D forming flow passages through which the heat medium passes. A magnetic heat pump device is configured by alternately performing magnetization and demagnetization of the magnetic work body units 26A to 26D.

The disclosure provides an MAX phase material, a preparation method therefor, and application thereof. The molecular formula of the MAX phase material is represented as M.sub.n+1(A.sub.zA.sub.1z).sub.hX.sub.n, wherein M is selected from group IIIB, IVB, VB or VIB elements, A is selected from element Zn, Cu, Ni, Co, Fe or Mn, A is selected from group IB, IIB, VIII, IVA, VA or VIA elements, X is selected from elements C and/or N, n is 1, 2, 3 or 4, 0<z1, a unit cell of the MAX phase material is formed by alternately stacking M.sub.n+1X.sub.n units and (A.sub.zA.sub.zA.sub.1z).sub.h layers of atoms, and h is the number of layers of the (A.sub.zA.sub.zA.sub.1z) layers of atoms located between the M.sub.n+1X.sub.n unit layers, and h is 1, 2 or 3.

A method for forming a caloric regenerator includes depositing layers of additive material. The additive material includes a caloric material. The method also includes joining the layers of additive material to one another. After joining the layers of additive material, the caloric regenerator includes a regenerator body that extends longitudinally between a hot end portion and a cold end portion. A working fluid is flowable through the regenerator body between the hot and cold end portions of the regenerator body. The layers of additive material are deposited such that one or more of a cross-sectional area of the regenerator body, a void fraction of the regenerator body, a characteristic size of the caloric material, and a composition of the caloric material varies along a length of the regenerator body between the hot and cold end portions of the regenerator body.

Provided are a sheath-integrated magnetic refrigeration member capable of preventing degradation of a magnetic refrigeration material with time in a magnetic refrigeration system without lowering the magnetocaloric effect and the thermal conductivity of the magnetic refrigeration material and its production method, and a magnetic refrigeration system using the sheath-integrated magnetic refrigeration member.

The invention is a linear or thin band-like sheath-integrated magnetic refrigeration member including a sheath part 1 containing a non-ferromagnetic metal material and a core part 2 containing a magnetic refrigeration material. The production method for a sheath-integrated magnetic refrigeration member of the invention includes a step of filling a powder of a magnetic refrigeration material into the cavity of a pipe containing a non-ferromagnetic metal material, and a step of linearly working the pipe filled with a powder of a magnetic refrigeration material according to one or more working methods selected from the group consisting of grooved reduction rolling, swaging and drawing. The magnetic refrigeration system of the invention is provided with a means of operating in an AMR (active magnetic refrigeration) cycle using the sheath-integrated magnetic refrigeration member of the invention as the AMR bed.

A passive magnetic device (PMD) has a base electrode, a multi-port signal structure (MPSS), and a substrate therebetween. The MPSS has a central plate residing in a second plane and at least two port tabs spaced apart from one another and extending from the central plate. The substrate has a central portion that defines a mesh structure between the base electrode and the central plate of the multi-port signal structure. A plurality of magnetic pillars are provided within the mesh structure, wherein each of the plurality of the magnetic pillars are spaced apart from one another and surrounded by a corresponding portion of the mesh structure. The PMD may provide a magnetically self-biased device that may be used as a radio frequency (RF) circulator, an RF isolator, and the like.

An article for magnetic heat exchange includes a functionally-graded monolithic sintered working component including La.sub.1-aR.sub.a(Fe.sub.1-x-yT.sub.yM.sub.x).sub.13H.sub.zC.sub.b with a NaZn.sub.13-type structure. M is one or more of the elements from the group consisting of Si and Al, T is one or more of the elements from the group consisting of Mn, Co, Ni, Ti, V and Cr and R is one or more of the elements from the group consisting of Ce, Nd, Y and Pr. A content of the one or more elements T and R, if present, a C content, if present, and a content of M varies in a working direction of the working component and provides a functionally-graded Curie temperature. The functionally-graded Curie temperature monotonically decreases or monotonically increases in the working direction of the working component.

Disclosed herein are embodiments of an enhanced resonant frequency hexagonal ferrite material and methods of manufacturing. The hexagonal ferrite material can be Y-phase hexagonal ferrite material, such as those including strontium. In some embodiments, oxides consistent with the stoichiometry of Sr.sub.3Co.sub.2Fe.sub.24O.sub.41, SrFe.sub.12O.sub.19 or CoFe.sub.2O.sub.4 can be used form an enhanced hexagonal ferrite material.

Disclosed herein are embodiments of an enhanced resonant frequency hexagonal ferrite material and methods of manufacturing. The hexagonal ferrite material can be Y-phase hexagonal ferrite material, such as those including strontium. In some embodiments, oxides consistent with the stoichiometry of Sr.sub.3Co.sub.2Fe.sub.24O.sub.41, SrFe.sub.12O.sub.19 or CoFe.sub.2O.sub.4 can be used form an enhanced hexagonal ferrite material.

A magneto-caloric thermal diode assembly includes a magneto-caloric cylinder. Each of a plurality of thermal stages includes a plurality of magnets and a non-magnetic ring. The plurality of magnets is distributed along a circumferential direction within the non-magnetic ring in each of the plurality of thermal stages. A variable speed motor is coupled to one of the magneto-caloric cylinder and the plurality of thermal stages. The variable speed motor is operable to rotate the one of the magneto-caloric cylinder and the plurality of thermal stages relative to the other of the magneto-caloric cylinder and the plurality of thermal stages.

A process is disclosed for producing a magnetocaloric composite material for a heat exchanger. The process comprises the following steps: Providing (S110) a plurality of particles (110) of a magnetocaloric material in a shaped body (200) and immersing the plurality of particles (110) present in the shaped body (200) into a bath in order to coat the particles by a chemical reaction and bond them to one another.