摘要:
A ferromagnetically coupled magnetic recording medium having a first ferromagnetic layer, a second ferromagnetic layer, and a ferromagnetic coupling layer to ferromagnetically couple the first ferromagnetic layer to the second ferromagnetic layer is used as stable magnetic media with high MrT in high density recording hard drives. The first ferromagnetic layer is the stabilization layer and the second ferromagnetic layer is the main recording layer. The ferromagnetic coupling layer comprises a conductive material having a thickness which produces ferromagnetic coupling between said first ferromagnetic layer and said second ferromagnetic layer via the RKKY interaction.
摘要:
A device and a method are described for feeding a material layer onto a construction platform, or onto at least one material layer located on the construction platform, for producing an object, which is mounted so it is linearly movable relative to a material reservoir and the construction platform along a motion plane, to which the material reservoir and the construction platform can be orthogonally deflected. A circulating band IS stretched around at least two molded bodies, which contacts at least in segments the molded bodies. a drive circulates the band around the at least two bodies. The band has a band segment which can be fixedly assigned relative to at least one body in the longitudinal section around the at least two molded bodies. The band segment at least in segments contacts the material stored in the material reservoir during the linear motion from the material reservoir to the construction platform so that at least a part of the material can be stripped off from the material reservoir and can be applied as the material layer to the construction platform to compress the material layer.
摘要:
An apparatus may include a first magnetic layer, a first exchange break layer formed on the first magnetic layer, a second magnetic layer formed on the first exchange break layer, a second exchange break layer formed on the second magnetic layer, and a third magnetic layer formed on the second exchange break layer. The first magnetic layer has a first magnetic anisotropy energy, Hk1, the second magnetic layer has a second magnetic anisotropy energy, Hk2, and the third magnetic layer has a third magnetic anisotropy energy, Hk3. In some embodiments, Hk1−Hk2 is less than Hk2−Hk3. In some embodiments, the apparatus may be a perpendicular magnetic recording medium.
摘要:
An apparatus includes a first seedlayer including a hexagonal close-packed alloy with a sigma phase addition, and an active layer including a plurality of quantum dots on the first seedlayer. The apparatus can further include a substrate, an adhesion layer on the substrate, and a wetting layer on the adhesion layer, wherein the first seedlayer is on the wetting layer.
摘要:
A high areal recording density longitudinal magnetic recording medium having improved thermal stability and signal-to-medium noise ratio (“SMNR”), comprises: (a) a non-magnetic substrate having at least one surface; and (b) a layer stack overlying the at least one surface, comprising a plurality of vertically spaced-apart ferromagnetic layers, each vertically adjacent pair of ferromagnetic layers being spaced-apart by a respective non-magnetic spacer layer, wherein: (i) at least one of the plurality of vertically adjacent, spaced-apart pairs of ferromagnetic layers forms an anti-ferromagnetically coupled media (“AFC”) component of the magnetic recording medium; and (ii) at least one of the plurality of vertically adjacent, spaced-apart pairs of ferromagnetic layers forms a laminated media (“LM”) component of the magnetic recording medium.
摘要:
A method for measuring the total track width of a test track and adjacent erase bands written over an erased area of magnetic media is disclosed. The test track has a known test track center and effective track width, and contains a periodic signal having a known maximum signal strength. An erase is performed at a certain position from the test track center, followed by a reading of the remaining signal strength of the test track, measured at the test track center. The remaining signal strength is stored as a data value as a function of the position of the erase. The erase, reading, and data value storage steps are repeated at various positions from the test track center, each position being successively closer to the test track center. When the remaining signal strength is less than 50% of the maximum signal strength, the test track is rewritten. The erase, reading, and data value storage steps are repeated at various positions from the test track center, this time on the opposite side of the test track. When the remaining signal strength is less than 50% of the maximum signal strength, the erase process may be terminated. From the stored data values, two additional data values are derived which represent the test track right and left boundary locations. The distance between the test track right and left boundary locations represents the total track width.
摘要:
A photovoltaic apparatus includes an absorber including a first quantum dot layer having a first plurality of quantum dots of a first quantum dot material in a first matrix material, and an up-converter layer positioned adjacent to the absorber layer, the up-converter layer including a second quantum dot layer having a second plurality of quantum dots of a second quantum dot material and a second matrix material.
摘要:
In a nonreturn valve having a tubular body, which can be installed in a vertical section of an exhaust line, a valve seat, formed within the tubular body, for at least one float, and at least one circumferential groove, which is open in the downstream direction, the intention is to make available a solution by means of which it is possible to provide a nonreturn valve that is simple, advantageous in terms of production engineering and has a particularly high performance, and to do so in a way which is simple in terms of design and is economical. This is achieved by virtue of the fact that the circumferential rim of the at least one float projects radially over the radially inner circumferential wall section and has an axial lip facing upstream, which extends into the circumferential groove in the axial direction when the at least one float is resting on the valve seat.
摘要:
A photovoltaic apparatus includes an absorber including a p-layer having a bandgap greater than about 2 eV, an n-layer having a bandgap greater than about 2 eV, and an amorphous SiGe intrinsic layer between the p-layer and the n-layer; a first electrode adjacent to a first side of the absorber; a second electrode adjacent to a second side of the absorber; and an up-converter layer positioned adjacent to the second electrode on an opposite side of the second electrode from the absorber, wherein the up-converter layer includes a plurality of quantum dots of a first material in a matrix of a second material.
摘要:
A ferromagnetically coupled magnetic recording medium having a first ferromagnetic layer, a second ferromagnetic layer, and a ferromagnetic coupling layer to ferromagnetically couple the first ferromagnetic layer to the second ferromagnetic layer is used as stable magnetic media with high MrT in high density recording hard drives. The first ferromagnetic layer is the stabilization layer and the second ferromagnetic layer is the main recording layer. The ferromagnetic coupling layer comprises a conductive material having a thickness which produces ferromagnetic coupling between said first ferromagnetic layer and said second ferromagnetic layer via the RKKY interaction.