摘要:
A value document authentication system comprising a value document substrate having a luminescent compound disposed on or in at least a portion of the value document substrate, wherein the luminescent compound (i) comprises a host lattice having at least one metallic ion with magnetic properties and is doped with at least one rare earth ion capable of emitting infrared radiation with at least one distinct infrared wavelength when excited with an exciting light source having sufficient energy to excite emission from the luminescent compound and (ii) has a pre-determined ratio of metallic ions to rare earth ions such that the ratio corresponds to a parameter of a pre-selected decision criteria, both of which properties are measured at the same location on the value document and used to authenticate the value document.
摘要:
A magnetostatic wave device comprises a magnetic garnet single crystal film. The single crystal film magnetic garnet is represented by the general formula of Y 3 Fe 5-x-y In x M y O 12 (wherein M is at least one of Ga, Al and Sc, 0.01 ≤ x ≤ 0.45 and 0 ≤ y ≤ 1.2) and the Curie temperature is about 150°C to 285°C.
摘要:
This invention relates to a magneto-optical element which comprises a film of a Bi-substituted rare earth iron garnet selected from garnets of the following chemical formulas
(Bi x Gd y R z Y 3-x-y-z )(Fe 5-w Ga w )O 12
wherein R represents at least one element selected from rare earth elements other than Gd, and x, y, z and w are such that 1.00≦x≦1.30, 0.42≦y≦0.60, 0.01≦z≦0.05 and 0.40≦w≦0.62, and
(Bi x' Gd y' R z' Y 3-x'-y'-z' )Fe 5 O 12
wherein R is as defined above, and x', y' and z' are such that 1.10≦x'≦1.30, 1.00≦y'≦1.80, 0≦z'≦0.06 provided that x' + y' ≦3. An optical magnetic field sensor capable of detecting zeroth to higher order beams of diffracted light is also described.
摘要:
A photothermomagnetic recording film manufacturing method in which a perpendicular-magnetization film of a Bi-substituted rare earth iron garnet is formed on a substrate by sputtering a target consisting of an oxide which contains at least Bi atoms, Fe atoms, and rare earth atoms, and then depositing the atoms constituting the oxide which have been released from the target by the sputtering on a substrate which is maintained at a temperature of at most 700oC. Thus it is possible to obtain a perpendicular-magnetization film of Bi-substituted rare earth iron garnet which has a large Bi-substitution quantity (x), and consequently has an extremely large Faraday rotation angle F, a sufficiently large coercive force Hc, as well as a sufficiently small absorption coefficient alpha. Accordingly it is possible to manufacture a photothermomagnetic recording film which has extremely good photothermomagnetic recording characteristics. Moreover, since it is possible to select the quality of the substrate on which the photothermomagnetic recording film is to be formed, the method is extremely advantageous from the manufacturing point of view.
摘要:
YIG film microwave apparatus, utilising the ferrimagnetic resonance of a YIG film, comprises a YIG film microwave device (1) formed by a liquid phase epitaxial growth process and a photolithographic process, and a magnetic circuit (2) including permanent magnets (4) for applying a DC magnetic field to the YIG film microwave device (1). ). The Fe 3- ions of the YIG film are partially substituted by nonmagnetic ions to provide YIG film microwave apparatus with satisfactory temperature characteristics. The YIG film microwave apparatus is capable of operating stably over wide ranges of working frequencies and temperatures.