Abstract:
The invention is used in the field of materials engineering and relates to antiferromagnetic layer systems as well as to methods for magnetically storing data that can be used, for example, in computer hard disks. The aim of the invention consists of providing an antiferromagnetic layer system and methods with which a specific writing and reading of information is made possible in antiferromagnetic layer systems of the aforementioned type. To this end, an antiferromagnetic layer system is provided, which consists of at least one ferromagnetic (1) and of at least one antiferromagnetic layer (2), whereby the Curie temperature of the ferromagnetic layer material is greater than the blocking temperature of the antiferromagnetic layer material. In addition, the ferromagnetic and antiferromagnetic layer(s) are coupled to one another at least with regard to their magnetization configurations by means of exchange anisotropy effects, and the layer thickness of the antiferromagnetic layer(s) is a function of the operating temperature of the employed antiferromagnetic layer system, whereby the layer thicknesses also increase with increasing operating temperatures.
Abstract:
An apparatus for focusing plasmon waves to a spot. The plasmon waves are there converted to light. In one application, the light is used for heat induced magnetic recording. In another application, the light is used as a part of near field scanning microscope. The plasmon waves may be induced on a converging rectangular cone (120) having an aperture (92). The plasmon waves may also be focused on a flat surface (23) by a curved dielectric lens (16). In the heat induced magnetic recording embodiment, a magnetic pole (50, 130) structure is integrated into the focusing apparatus, either as one surface of the rectangular cone, or as a layer (52, 54) upon which the curved dielectric lens is formed.
Abstract:
In accordance with the present invention, there is provided an apparatus comprising a tape having an information layer on which information is storable in the form of perturbations, an array (10) of probes (11) that in function faces the tape (2) such that the probes scan the surface of the tape, means for selectively forming the perturbations via the probes, means for detecting the presence of the perturbations via the probes, and drive means (20, 25, 40, 42) for moving the tape relative to the array of probes. The apparatus allows to store high data capacities at a small form factor.
Abstract:
A method and device for nanometric recording, reading and erasing of changes in a material using the multifunctional capabilities of a tip (1.1) of a scanned probe microscope. The tip is in near-contact with a material (1.3) to impose a field or force and to monitor the change it has imposed.
Abstract:
Macroscopically manipulable nanoscale devices made from nanotube assemblies are disclosed. The article of manufacture comprises a macroscopic mounting element capable of being manipulated or observed in a macroscale environment, and a nanoscale nanotube assembly attached to the mounting element. The article permits macroscale information to be provided to or obtained from a nanoscale environment. A method for making a macroscopically manipulable nanoscale devices comprises the steps of (1) providing a nanotube-containing material; (2) preparing a nanotube assembly device having at least one carbon nanotube for attachment; and (3) attaching said nanotube assembly to a surface of a mounting element.
Abstract:
A micromechanically manufactured read/write head (1) for charge coupled devices has a holder (2), a bearing arm (3) and a point (4) with a shaft (4a) and a front end (4b). The holder (2), the bearing arm (3) and the point form an integrated part (5) made of conductive material. The front end (4b) of the point (4) can directly contact the surface of a charge coupled device to read and write information. The shaft (4a) of the point (4) has a small diameter and is surrounded by a reinforcing sheath (6).
Abstract:
A method of actuating a plurality of probes. Each probe may be made of two or more materials with different thermal expansion coefficients which are arranged such that when the probe is illuminated by an actuation beam it deforms to move the probe relative to a sample. Energy is delivered to the probes by sequentially illuminating them with an actuation beam via an objective lens in a series of scan sequences. Two or more of the probes are illuminated by the actuation beam in each scan sequence and the actuation beam enters the objective lens at a different angle to an optical axis of the objective lens for each probe which is illuminated in a scan sequence. The actuation beam is controlled so that different amounts of energy are delivered to at least two of the probes by the actuation beam during at least one of the scan sequences.
Abstract:
Described herein is a process for manufacturing an interaction structure for a storage medium, which envisages forming a first interaction head provided with a first conductive region having a sub-lithographic smaller dimension (W 1 ). The step of forming a first interaction head (7) envisages: forming on a surface (14) a first delimitation region (15) having a side wall; depositing a conductive portion (16b) having a deposition thickness substantially matching the sub- lithographic smaller dimension (W 1 ) on the side wall; and then defining the conductive portion. The sub- lithographic smaller dimension (W 1 ) is between 1 and 50 nm, preferably 20 nm.
Abstract:
A data storage device comprises a storage medium, at least one probe designed for creating indentation marks in the storage medium, a control unit designed for creating a control parameter (CTRL) acting on the probe resulting in the creation of one indentation mark. The control unit is further designed for modifying the control parameter (CTRL), if at least a given number of consecutive indentation marks with a given minimum distance between each other should be created. According to the method the control parameter (CTRL) is modified if at least a given number of consecutive marks with a given minimum distance between each other should be created.